Category Archives: half marathon

Genetic Potential Fitness

GPF, Genetic Potential Fitness

What is Genetic Potential Fitness? How do you apply the concept to your favourite hobbies? Did you know it need not have anything to do with your physical fitness? Can you possibly measure it accurately? How could you estimate it? How does it vary through your life? What is an optimal level for your performance target? What should you do to ensure that your performance stays optimal?

What is GPF, Genetic Potential Fitness?

In a recent media interview when I made reference to Genetic Potential Fitness, a term I coined when proposing a framework for lifelong assessment of progress, I meant for it to be relevant for all your dimensions of existence. Although, at first, because of the word ‘fitness’ in the acronym, GPF appears to be relevant for sporting activities, it is applicable for just about every dimension of human endeavour. Or even where you are not consciously making an effort.

Your performance at anything you do, whether it be playing a game of chess, writing poetry, painting or running a marathon is a combination of the genes that came from your parents and the nurturing of that aspect of your life. You cannot do better than your genes will permit – a fast tortoise will never overtake an average rabbit – but how good can you get? As good as your genes will permit!

It is important to note that I am not saying that only your genes solely determine your actual performance. As a matter of fact, I live my life believing and professing quite the contrary. What I am referring to is an upper bound on your actual performance – and if your actual performance is 50% about your genes, then the other 50% is driven by all those parts that were in the roots of the Wellness Tree.

Your GPF has nothing to do with what others are doing

When I first had an IQ test about 30 years ago two things became clear to me around that time. One was bad news, the other good. The first was that deterioration was guaranteed (bad news) but the second was that the rate of deterioration was significantly under my control (good news). From that time on, just being smarter than over 99% of the population in a very narrow dimension of existence was not what was all important for me. My own performance relative to myself is what matters. I made direct reference to this when I spoke to you about what you could do regarding Competing and Comparing, Targeting Happiness Maximization.

What therefore became more relevant for me three decades ago was the need to have a strategy to maintain that specific measure of (mental) fitness as close to what was genetically possible for the next 80 years ahead. And the same for all the other parts of my Wellness Tree. This theme also appeared when I told you why I do not care much about your podium finish (or mine)!

What does GPF apply to?

I spoke a few days ago about the Wellness Tree but what about achievable targets for those many branches of wellness? Your fitness levels in physical, mental, emotional and spiritual health are all equally important. From those branches, even if you pin-point a very specific leaf e.g. controlling anger, you can have a quantifiable measure that can be improved upon. Perhaps the measure chosen for a specific leaf is open for debate – for instance, what measure correctly captures how mindful you are? Having said that, it should be possible for you to focus on ways to work on your performance in that dimension.

Because you can think of GPF being applicable to anything you do, there are literally millions of versions of it depending on the granularity you decide to look with. For instance, you could have your GPF with respect to muscular endurance, or specifically running, and even more specifically, running marathons, and to be yet more specific, running long distances uphill. In summary, the concept of GPF can be used to focus-in with depth, or it can be used to zoom-out to look at your life from a broader perspective.

Can you measure your GPF exactly?

I do not believe that you can measure your true GPF exactly. Because you are typically so far from your genetic potential in most things, and perhaps a little closer in a few that interest you, you rarely ever have a precise measure of it. Perhaps if you are competing at an elite level e.g. Olympic swimming, you can have a narrower estimate range for your GPF in that specific sport – in fact specifically for the stroke that you specialize in. For the rest of us, non-Olympians, GPF is a measure that we are typically very far from. In fact, even the Olympic athlete is likely to be close to his GPF in only a specialized set of activities that her focus is on e.g. 50m backstroke.

Estimating GPF

Although you cannot measure it exactly, what you can do is estimate your GPF. If you work really hard on your squash game for 12-24 months you could get to a level that is very close to (but lower than) your GPF for squash. Because you are close to it, estimating your GPF is likely to be more correct. However, if you have never played water polo, during that same period of squash training, you are likely to be very far (much worse) than your GPF in water polo. And, because you are far from it, confidently estimating its level within a narrow range is difficult.

Estimating your GPF is easier when you are closer to it

How can GPF be useful for you?

So, if your GPF is something that is far from your current ability and is difficult to estimate anyway, what use is it?

Each of the three individual terms provide clues to answer that question. One of the benefits of giving serious thought to the concept of GPF is that it allows you to think about what you might be naturally capable of, given your genetic foundation. The other benefit is that it allows you to think about your potential and thus it can be a realistic motivating factor in your practice. And, finally, to the extent that the term fitness focuses your mind on the various branches of wellness, that is a good thing too.

How does your GPF change through your life?

You will have gathered by now that your GPF is a useful benchmark about where you could get to given your genetic material. Your GPF will change throughout your life for various reasons and depending on the activity or measure you are considering. Some physical fitness measures e.g. muscular endurance peak in the second or third decades of our lives. Typically flexibility is highest closer to birth. Some skills based measures deteriorate faster than health based measures of fitness. Your IQ (as measured by standardized tests) will have peaked in early adult life. Some measures of emotional health can get stronger as we age. Perhaps some measures of spiritual health continue to strengthen as we go through life all the way up to the point of death. And, it may be that something like wisdom necessary increases through life, almost by definition.

Your GPF varies differently through your life depending on what it is focused on

If you examine the roots in the Wellness Tree you will see that many factors feed into the branches. Because life is typically path dependent, your GPF will also be altered by what you feed the roots for the branches to flourish. At a microscopic level, your body literally turns genes on/off based on the exposure it faces. So, you can think about the various factors (roots of the Wellness Tree) and how they might turn certain genes on/off.

Although I said earlier that your GPF has nothing to do with others, there is of course an environment that is created by others too that affect your life and possible gene expression. This could be as sinister as second- hand smoking or even third-hand smoking, or as benevolent as a best friend with an excellent sense of humour.

What is an optimal level to be at relative to your GPF?

Depending on what you are measuring this ought to vary considerably. For instance, if you enjoy playing your piano for recreation, perhaps being far from your GPF is desirable or at least not a problem. On the other hand, if your interest is in performing for others then perhaps you will want your performance at the piano to be pushed closer to your GPF. Or it might simply be that taking your playing closer to your GPF is precisely what makes you happy, even though you play for no one other than yourself.

The largest constraints we typically face are those of ‘time’ and ‘money’. And for most of us, the constraint that is typically binding is ‘time’. So, with constraints of this nature and many different areas of interest, it is natural to think of a portfolio of interests and trade-offs between them in terms of proximity or distance to their respective GPFs.

And as you go through life, your interests and preferences will change, as will your constraints. If you think of your basket of interests, the decision for each constituent in that basket will also vary. Perhaps running marathons is of less interest to you now that you have taken up Latin dance and bread-baking. Approaching these changing interests in a structured manner will allow you to be at greater peace with the decisions you make. Even Olympic athletes cannot simultaneously maintain fitness close to their GPF in more than a few areas.

How do you get to your target level relative to your GPF?

The simple answer is “it is complex”. If you look at the Wellness Tree again, you will see the myriad pathways to the roots of the tree. To ensure that any branch flourishes will require you to engage as many of the paths in some optimal manner. I shall explain this in more detail in future conversations. For now, the key thing to remember is that your GPF is your GPF, that your GPF varies over your lifetime, and you can do things to get yourself to get closer to it at any age – but only if that is your wish. There is no compulsion!



Dr Purnendu Nath spends his waking hours focusing on helping individuals and organizations reach their goals, to make the world a better place. He speaks, writes and advises on topics such as finance, investment management, discipline, education, self-improvement, exercise, nutrition, health and fitness, leadership and parenting.

As Beautifully Simple as PuruTheGuru’s Wellness Tree

The Wellness Tree – CLICK to ENLARGE

I have grown it for you, and here it is today, The Wellness Tree from Puru The Guru.

Quick Background

A few weeks ago, I presented you with The Better Life Infographic. That infographic pertained to information, thoughts, feelings, actions, results. However, almost every day someone I mentor asks a question about the benefits of ‘this’ or the problems associated with ‘that’. The ‘this’ or ‘that’ could range from anything like ‘running while listening to music’ or ‘the impact of drinking coffee on the effort to regenerate the beta cells of the pancreas’ or something as banal as ‘body-sculpting to get a 6-pack’.

The Wellness Tree

For living life well, I believe we need to focus on our physical, mental, emotional and spiritual health. These branches of the tree of wellness will be healthy and grow well if the driving factors that feed into them, the roots, are managed well.

Most things in life are multifactorial, and so it is with wellness. Some things have a small impact, some large, some a positive impact, some negative, and in most cases the impact is non-linear. In addition, things can get confusing from interactions between two or more factors. On top of that we have the impact of my favourite variable, time! In practice, almost nothing stands still as time flows. So, as I’ve said before, details matter.

Fruits from The Wellness Tree

In the weeks ahead, you will hear from me on a wide range of topics. I grew this Wellness Tree as a backdrop to describe various concepts, discuss many hypotheses and present guidance – usually with, sometimes without, evidence.

This tree probably won’t grow much above the ground i.e. I am unlikely to change my definition of wellness. However, below the ground, the roots might start branching further as the weeks go by as and when I decide to fill in further detail as relevant to the topic, or based on my mood. For instance, if you look under wellness->activities->social the root has not branched out further yet – but, perhaps, it will! Whenever the tree grows in any part, the ‘last updated’ will have a fresher date. Keep an eye on that!

I suppose one more thing to point out at this stage is that often what we think is important for good health is just one part of myriad changes we can make in life for living it well. For instance, it might take you a while to even locate ‘exercise’ in that tree, and when you do, you might continue to look but will not find something as powerful as ‘running’ in it. At least not in this version of 8th May 2017. That should also not surprise you if you have already read what I have said about why you need not run.

Learning from The Wellness Tree

You would do well to spend time looking at this tree as often as possible over the next few days. (Go ahead, bookmark this page, or save the image on your smartphone.) I suspect that, if you do, over time certain new thoughts will come to your own mind that you will be happy to explore further to live your life well – to live it better.

I will chat again soon, perhaps about that 6-pack question – or perhaps about the regeneration of the beta cells of your pancreas…who knows? We’ll see!

Enjoy the fruits of The Wellness Tree by focusing on the roots


Dr Purnendu Nath spends his waking hours focusing on helping individuals and organizations reach their goals, to make the world a better place. He speaks, writes and advises on topics such as finance, investment management, discipline, education, self-improvement, exercise, nutrition, health and fitness, leadership and parenting.

Race Start Logistics – Chaos, Flow and Entropy

Should you really be up front in the crowd at the start line?

Have you ever run one of the big races in India like the Standard Chartered Mumbai Marathon (SCMM) or the Airtel Delhi Half Marathon (ADHM) and had varying experiences about the ‘flow of crowd of runners’? As the number of racers has grown and the increased focus on logistics for handling them has tried to avoid making a mess and avoid a human catastrophe, I have been curious about the flow of runners at the start and its subsequent impact along the route. Today’s conversation, with some interesting pictures, is about that. Takeaway lessons for you, racer, pacer or race organizer, will come soon.


I will first talk about the distribution of runners and how it transitions from start line to finish line. I then introduce you to my idea of ‘disorder’ in a race, with a measure that I call the Race Entropy, and show how that beautifully captures the flavour of the ease of flow within a race. I use the case of the Mumbai races (SCMM) to show how start-enclosures have helped with achieving less disorder (but significant room for improvement exists). I also show what impact the extreme pollution scares in New Delhi last winter had on the race that was held at that time (ADHM2016).

Gross Time, Net Time, Mat Crossing Time

I have shown you numerous graphs in the past of race finish times. These are typically histograms of ‘net finish times’ that show how many runners cross the finish line within each time bucket, where each bucket might be just a few seconds wide. What you will have probably never seen until today is a similar picture of what happens at the starting line.

How do we spread ourselves out over time?

Because not everyone crosses the starting line at the same time, there is a ‘spreading out’ or ‘distribution’ over time of runners crossing the starting line. This distribution is what leads to the need for recording gross finish time and net finish time.
The gross time is based on the natural clock time – the same clock for all the runners.
The net time is the specific time taken for each individual runner measured as, starting at their specific start line crossing (time = 0) and ending at their crossing the finish line.
Many races have RFID timing sensors placed under mats over which runners pass at the start/finish line, and so we often use the terms ‘starting line’ and ‘starting mat’ interchangeably.

Easing Flow

If your race’s logistics are handled smoothly, the fastest runners would be placed right up front at the start line and the slowest runners placed towards the back of the crowd. In the extreme scenario of the runners being released in descending order of their speed, in the hypothetical situation of constant speed for each runner, the number of ‘overtakings’ would be 0. No one would overtake anyone despite everyone running at their race pace. This would ensure a smooth flow of humans across the starting line and thereafter.

Smooth flow of runners ranked in order of speed

In practice, although it ‘feels good’ to overtake other runners, the truth is that it always involves some risk. Besides the physical risk (of impact) if the runner being overtaken sends you negative thoughts as you try to glide past him, that cannot be good for your soul.

Consider now, the worst situation for race start ordering, the slowest runner being placed right up front and the fastest runner at the back of the pack. In the extreme situation of N runners placed in such a reverse order of their speed, the fastest runner would have to overtake N-1 other runners to finish 1st. The runner who comes in second would have to overtake N-2 runners to come in 2nd. And so on for all the other runners… And, therefore, {ignoring the school maths proof}, the total number of ‘overtakings’ for all N runners would be ½*N*(N-1). Let us call that measure MaxPossibleOvertakings – e.g. for 10,000 participants placed in this reverse order MaxPossibleOvertakings will be 49,995,000.

Flow disrupted when runners not ranked in order of speed

For any given race with an actual ordering at the start line, we can also easily add up the minimum number of ‘overtakings’ that would have led to the actual finish ranking observed. Let us call this MinPossibleOvertakings.

Having defined a measure for the actual starting/finishing rankings of runners and the theoretical measure with maximum disorder, let me now tell you about what I call the ‘Race Entropy’ of an event. If numbers or equations faze you, hang in there, there’s nothing particularly complicated in what follows.


Borrowing from Thermodynamics, I define the measure of disorder in a race as being the ratio

Entropy – a measure of disorder in your race

If the runners are released in the perfect ranking of their eventual times, so that there will be no overtaking, the Race Entropy will be 0.
If the runners are released in the perfectly reverse order, the Race Entropy will be 1.
If the ordering is purely random chance, the Race Entropy will be approximately ½.
We hope that the Race Entropy for any race will be less than ½ and closer to 0.

Start-End Ranking Plot

We can also visualize this order and disorder with what I call a Start-End Ranking Plot – a rank for crossing the finish line plotted against the rank for crossing the start line. This example plot shows the two ends of [1] perfect order and [2] perfect disorder as well as [3] the case of purely random start ordering.

Start-End Ranking Plot: Avoiding disorder or wrong order is a worthy effort

Start-End Ranking Plot: Avoiding disorder or wrong order is a worthy effort

With this distilled single measure of disorder, Race Entropy, and the Start-End Ranking Plot, let us now examine a couple of interesting stories from the Indian recreational marathon scene.

Case 1 – Chaos to Order: Introduction of Enclosures for SCMM

The first year that I happened to run a distance race, quite by chance, was the flagship Mumbai Marathon in 2010 (SCMM2010). I remember being at the start line and witnessing the undignified pushing and jostling. It was pretty much ‘law of the jungle’ up there akin to the local trains I took to work daily. It was a free-for-all, first-come-first-serve type start, so everyone pushed up ahead, with no real attention to ordering themselves naturally by expected finish time.

Race Start Enclosures

Race start enclosures or ‘holding areas’ were first introduced to the Indian running scene in January 2012, at the Standard Chartered Mumbai Marathon. These enclosures, now common in the races with large numbers of participants, are set up with the philosophy that the fastest runners are kept together and typically go past the start line first, the slowest ones last, and the ones in-between following the same principle. In order to decide which start-enclosure you wait in before you start the race, race organizers request a recent race timing certificate from you at the time of registration. Based on this ‘previous timing certificate’ you, the customer, are allocated a start enclosure, specified visibly on your racing bib.

Pre/Post Enclosures

Start Enclosures help ensure reduced Race Entropy (disorder) despite an increase in competitors

If we examine the difference between 2010 & 2011 compared with 2016 & 2017 there is a noticeable reduction in Race Entropy despite the number of participants rising. Having seen the Race Entropy drop between 2010 to 2017 despite the massive increase in participation, we can see the Start-End Ranking Plot which corresponds to those numbers and the picture tells us the same story.

Comparing the Start-End Ranking Plot for 2010 with that from 2017 indicates a clear move away from high disorder towards greater order.

Population increase need not be a problem if mismanagement is replaced by better management!

Case 2 – Pollution Reduces Race Participation: Massive Reduction in Delhi Disorder

The flagship race of New Delhi, soon after the worldwide scares in the media about the city’s air pollution levels at the end of 2016, saw a massive reduction in actual participation on race day (ADHM2016). My simple but sensible estimation method tells me that 40% of those who had paid and were registered to race did not show up on race day. This is almost always fortunate for the race organizers and those who do show up to run. The race experience is always better for such large races when the turnout is lower {fewer people chasing the same resources including, quite literally, air, water and land}.

What did the fearless who turned up experience?

What is interesting is that the Race Entropy was so much lower (20.3%) than in 2012 (32.0%) when the ADHM first introduced start enclosures. It was also considerably lower than the previous year where in ADHM2015 the Race Entropy was 26.8%. Perhaps, the general time trend in Race Entropy shows that the running population itself is becoming slightly mature and sensible as a group about the race start. For ADHM2016, it is possible that a predominance of experienced runners showed up and many of the newer runners stayed away. Or, perhaps, managing fewer runners with arrangements for many more (who did not show up) induces lower Race Entropy (lower disorder). All my friends who ran ADHM2016 had a fantastic experience. As luck would have it the weather was (described by a mentee who ran) ‘absolutely perfect’ and my guess is that the reduced disorder added to a better overall experience.

Pollution Scares: Did the drop in crowding make humans more relaxed and reduce irrational crowding?

Once again, comparing the Start-End Ranking Plot for 2017 with that from 2012 when the number of participants was similar and start-enclosures had just been introduced indicates a clear move away from high disorder towards greater order.

Did the reduced crowd density encourage more orderly behaviour?

Summary and Way Forward

I introduced the concept of ‘disorder’ or Race Entropy to characterize the (lack of) ease of flow within a race. I showed how the introduction of start-enclosures based on ‘expected finish time’ helps reduce this Race Entropy (disorder). So, besides features such as aid stations, route marshaling, medal quality, pricing of race entry tickets, and post-race refreshments Race Entropy serves as a superb single measure to capture the overall race experience for those who turned up.

I will write again soon and provide guidance to you the racer, race pacer or race organizer based on this dimension of analysis.

Until then, try to not bump into anyone 🙂


Dr Purnendu Nath spends his waking hours focusing on helping individuals and organizations reach their goals, to make the world a better place. He speaks, writes and advises on topics such as finance, investment management, discipline, education, self-improvement, exercise, nutrition, health and fitness, leadership and parenting.

SCMM-2017 – A Quick Update on Quantity and Quality

*Net Finish Times winsorized at 6:15 [click to enlarge]

*Net Finish Times winsorized at 6:15       [click to enlarge]

Memories of each SCMM fade quicker each year as the racing calendar in India gets more crowded with each passing year. However, as the flagship race of the country it is worthwhile using it as a benchmark race to assess how things are progressing, both for the race itself and for the runners within it.

I wrote a quick update on the numbers of 2016 a year ago, and this short conversation is to mirror that with an update for the 2017 race event of 15th January.

The total number of participants in the Standard Chartered Mumbai Marathon went up again this year but only marginally (by less than 1000). Of that, in the half marathon, the numbers were capped (presumably for safety reasons) and the full marathon saw another year of increasing participation.

The overall (mean and median) race times of those who crossed the finish line was slower for the half marathon. (I might provide further insight regarding that in the weeks ahead.) For the full marathon, the worsening we have seen in the last two years, became worse (slower) this year. It is not unlikely that the increased worsening in finish times is driven by the large number of new entrants, but given that the number of entries has been increasing every single year, to blame the newbies for the recent worsening is unjustifiably unfair without delving into the details.

To get a better picture of what has been happening with aggregate numbers, you can also see my much earlier report on what happened between 2010-2014. And for the most sophisticated analysis on Indian marathon running so far you may want to look at the question “Are Recreational Marathoners in India getting Faster?” and its follow-on multi-year cohort analysis in “You are getting slower sooner than you think“.

Please click on ONE choice for YOUR answer here

If you had not already thought about it when looking at the graphs and tables in this article, then from the two earlier articles on consecutive races, and multi-year cohort analysis, you would have figured out that interesting stories are hidden in the details of aggregated statistics. I might tease out more such stories for you in the weeks to come. Until then, here are the tables for the graphs above.

*Net Finish Times winsorized at 6:15 (Standard Chartered Mumbai Marathon)

*Net Finish Times winsorized at 6:15 (Standard Chartered Mumbai Marathon)



Dr Purnendu Nath spends his waking hours focusing on helping individuals and organizations reach their goals, to make the world a better place. He speaks, writes and advises on topics such as finance, investment management, discipline, education, self-improvement, exercise, nutrition, health and fitness, leadership and parenting.

Reporting on Pacing Failures at the SCMM 2017

The FunRunParty Bus

The FunRunParty Bus

The Messenger is Back
Ever since my “Being a Pacer, Choosing a Pacer – A Guide” I have published a table once a year after the Standard Chartered Mumbai Marathon (SCMM) on the performance of official pacers selected to set the pace for other recreational runners for various target times.

The reason for my tabulated updates after the race are outlined in the 2016 report and some lessons from pacer failures are outlined in the 2015 report.

Last Sunday, it felt great to be greeted throughout the race morning of the 2017 edition by runners who had used my freely available pacing bands. Even the tiny proportion of runners who decided to race with a pacer would have done well to use one of my pacing bands. For the SCMM, they were first released in 2016, and then republished in 2017. To see why I think they are calibrated brilliantly read this.

This Time you may Shoot the Messenger

Lights, Music, Dance, Colour

Lights, Music, Dance, Colour

A whopping 184 runners pre-registered their interest to make history and run on my FunRunParty 2-hour Bus and many others joined along the way. The goal was to party along the entire route and, as promised, we had lights, music, dance and other action.  Wine, however, was not served – nor was beer! Save a few grumblers, everyone who was part of it had a wonderful experience… so, success was achieved at least on the ‘fun party’ dimension!

Shockingly enough I did not realize until I crossed the finish mat that I had missed my own strict deadline requirement by 32 seconds! Abominable and unforgivable! So, this time around, we can shoot the messenger! Not that one should have any excuse, but I did encourage everyone on my bus to wear the pacing band for their own target times, and I joked that those who were targeting 1:59:00 were to keep me on track. (It’s not the easiest thing to watch both wrists in crowds when carrying a very large flag while running at 10.6228 km/h. Excuses shex-queue-zes… Stop it Puru!!)


OK, so here are the results in two separate tables for the half marathon and the full marathon.

Half Marathon

SCMM 2017 – Half Marathon – Pacer Performance

Full Marathon

SCMM 2017 – Full Marathon – Pacer Performance

Why are things still going wrong?
To continue to have half the pacers in the full marathon failing again this year is not a joking matter! The half marathon had significantly more failures than last year and the year before that– again not something to take lightly!
In terms of process, there continue to be odd things happening in the race times of the pacers listed. Just to cite a couple of examples and I am sure there are more:
Example 1: One of the 3-hour pacers for the half marathon was announced to have dropped out of the event because of a prior injury but his race time shows up as 2:17:33.
Example 2: Prior to the event I received communication from puzzled runners about the 3:45 pacer for the full marathon whose prior best time with the SCMM was 4:06:34. To give him the benefit of your doubt, which would have been formed based on what was advertised, perhaps he had indeed trained enough to achieve 3:45. However, those who decided to not run with him based on public information would have felt vindicated after he finished in 4:09:03.

So, What Next?
Presenting this table each year seems to not affect the outcome in the next year. But, it is still worth my doing so for the running community. On the bright side, do look out for more interesting articles from me based on this specific race in the weeks ahead that might be more relevant to your training as well as race experience.

Wait for the messenger!


Dr Purnendu Nath spends his waking hours focusing on helping individuals and organizations reach their goals, to make the world a better place. He speaks, writes and advises on topics such as finance, investment management, discipline, education, self-improvement, exercise, nutrition, health and fitness, leadership and parenting.

SCMM-2017 The 2-hr Party Bus with PuruTheGuru

The 2-hour Party Bus with Puru

The 2-hour Bus with Puru

To register FREE to be on the 2-hr FunRunParty Bus with me click here right now.

Registrations for the Standard Chartered Mumbai (Half) Marathon 2017 closed a few months ago. Since then, barely has a day gone by when someone or the other has not asked me if I would be a pacer again for the race coming up in 2 weeks on 15th January 2017.

Those whom I have paced at previous editions of the race in 2013, 2014, 2015 have asked if I would pace a faster time this year (for a repeat experience of success) and many have used my own reasoning (in many previous articles) that I pace a slower time to serve a greater number of runners. In 2016 while I helped promote running for fitness by shooting this movie at the SCMM, I reached out to help thousands of runners with achieving their race target through freely available customized pacing bands. Those bands are available again for 2017 – the numbers remain unchanged, because so does the race route – the small print has been updated! Please use them, they’re free, and they work beautifully!

This year, to give at least some of you the experience of running with me as a pacer in my ‘home race’, I invite those who have trained to do something close to 2-hours to run on my ‘2 hour FunRunParty Bus’ on race day (click here). So, if you have trained to run between 1:50 and 2:10 you might consider being part of my bus. I guarantee that for whatever time that you are able to be with me, you will have fun. Simply go to this link to register and I shall be in touch with you. Let your friends who are aspiring to finish in that time range know too so that they can be part of the fun with us! We already have many runners from across the planet registered to be on the bus

Do check out the pacer bands and print out as many as you think you need. Useful tip: if you are not sure if you can finish in 1:59 or 2:04, you can use the pacer bands for both, just stay within the corridor they set for you! If you think you can do something around the 2-hour mark, do it with me… go ahead and register here.

Looking forward to meeting you on race day!


Dr Purnendu Nath spends his waking hours focusing on helping individuals and organizations reach their goals, to make the world a better place. He speaks, writes and advises on topics such as finance, investment management, discipline, education, self-improvement, exercise, nutrition, health and fitness, leadership and parenting.

SCMM-2017 – Free Gifts

Free Gifts for Your SCMM-2017 Target

Get to the Finish Line within your Target Time
If you are running the Standard Chartered Mumbai Marathon (SCMM) on Sunday 15th January 2017 and want to get to the finish line within your target time then I have the perfect gift for you. Pace bands that are calibrated specifically for that race!

Quick Background
These wonderful gifts are free and available for you below. If you have not read about the (technical) background behind the creation of these gifts for you, you should definitely read more about them here. The actual gifts (to download) and instructions-for-use (video) are below.

My Dream Wish – Your Gift
I have a short fun video to show you how to use the bands. The links to your free bands are below, just scroll further down. We have designed, specifically for the 2017 edition of the SCMM, the following:
-Pacer Bands for the Half Marathon
-Pacer Bands for the Full Marathon
Scroll down to pick the one that’s right for you…

Instruction Video for your Band (93 seconds)

Your Half Marathon Bands – CLICK on as many as you wish – it’s your choice

Choose PINK or WHITE

Look Good, Run Well

1:39 (click)
1:44 (click)
1:49 (click)
1:54 (click)
1:57 (click)
1:59 (click)
2:04 (click)
2:09 (click)
2:14 (click)
2:19 (click)
2:24 (click)
2:29 (click)
2:34 (click)
2:39 (click)
2:44 (click)
2:49 (click)

Your Full Marathon Bands – CLICK on as many as you wish – it’s your choice

Choose WHITE and print on COLOURED PAPER if you want

Choose WHITE and print on COLOURED PAPER if you want

3:14 (click)
3:19 (click)
3:29 (click)
3:39 (click)
3:44 (click)
3:49 (click)
3:59 (click)
4:09 (click)
4:14 (click)
4:19 (click)
4:29 (click)
4:39 (click)
4:44 (click)
4:59 (click)
5:14 (click)
5:29 (click)
5:44 (click)


Disclaimer for other races
A word of caution to remember –  these bands have been calibrated specifically for the SCMM-2017 route and elevation profile. Although they might (approximately) work for other races of similar distance, they will not be ideal and you might find yourself being ahead or behind of the band at certain points of that other race.

Click, Print, Cut, Wear… Pose… and Run!


Dr Purnendu Nath spends his waking hours focusing on helping individuals and organizations reach their goals, to make the world a better place. He speaks, writes and advises on topics such as finance, investment management, discipline, education, self-improvement, exercise, nutrition, health and fitness, leadership and parenting.