The Real Science of Sport Podcast

SHOW NOTES
From the evidence on early specialisation to the formula most likely to produce a champion sportsperson, talent specialist Stuart Armstrong breaks down the science and data on identifying and developing young talent. For parents everywhere with a child showing sporting promise, Armstrong offers practical advice on how to sustain motivation and decide whether to pursue a pro sporting career or foster a lifelong love of sport. Armstrong also breaks down the path most likely to produce a champion, and it's not what you think. Armstrong is the managing director at Future Coach, a Learning Innovation Architect, Skill Acquisition Specialist and host of the Talent Equation Podcast and has spent most of his career working in the talent ID field, having previously worked for Sport England.

Members are invited to submit questions for a follow-up Members podcast with Armstrong via our Discourse channel. Become a Supporter here for ad-free shows, a members-only Applied show every week and regular discussions on our Discourse channel.

Links

Stuart's Future Coach website, his new venture.

Some of the studies related to the concept of early specialisation, as discussed on the show:
A systematic review of professional, elite and Olympic athletes. Those who delayed specialising had fewer injuries and, in most sports, performed better.
A systematic review of team sports that found early specialisation is linked to more injuries and more young players quitting. Playing a variety of sports helps them develop.
A study of 67,600 track and field athletes. Only about a quarter of the top-100 U18s made the senior top 100, and 68.5% of top-100 seniors had never been in the top 100 as juniors.
The study of nearly 6,000 Italian sprinters, hurdlers and throwers. The best reached their peak later, around 23–25, and only about 1 in 5 had been top level at 14–17.
A paper showing how inconsistently “early specialisation” is defined. Only 21% of 129 papers used the full four-part definition, which makes it hard to say what the harm actually is.
This study of Spanish sprinters found that only 3.8% of the top-20 U14s went on to reach the senior elite.
A review on junior tennis concludes that early specialisation raises injury risk and burnout without making it more likely a player reaches the elite. It recommends not specialising before age 12.
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Show notes

This week, why Solveig Løvseth and Magnus Ditlev collapsed in the heat at the Ironman World Championship in Kona, whether sports science innovation plays a part, and a Chicago Marathon that was faster than it felt:

(00:01:52) Amos Kipruto and Hawi Feysa win Chicago in the fifth-fastest times in history, though with no splits on screen we were left guessing. Jacob Kiplimo’s hamstring leaves him off a road podium for the first time in 27 races, and treadmill-trained Vincent Mauri made a bid for the US record but also fell foul of hamstring issues
(00:07:40) Ross analyses the top 100 marathoners in history. How many races did it take them to run their best time, and what does a suspicious late PB look like?
(00:23:02) Paul Seixas wins Il Lombardia, after riders delay the start to protest vehicles on the course. Gareth wants more from the riders, for their own benefit
(00:34:05) Solveig Løvseth collapses within reach of a second Kona title, and Ditlev drops out while leading. Her manager blamed nutrition and salt, while she doesn't know what went wrong. We think heat is the likeliest suspect, and that these athletes are highly unlikely to be under fuelling. We ask whether carbs and super shoes have have raised every limit except body temperature, and allowed athletes to crash into it more often? Should races monitor core temperature, and pull staggering/falling athletes out?
(00:54:16) Two new carb studies (150 vs 120 vs 10 grams an hour, and 100 beats 60 for improved durability), and how much you really need
(01:00:02) Pieter Coetze breaks the 50m backstroke world record. Is he South Africa’s likeliest gold medallist in LA?
(01:02:29) And finally, Rwanda will host Africa’s first Grand Prix since 1993, and a FIFPro report shows Luka Modrić played 76 matches in a season, and Moisés Caicedo flew 25,000km for four matches in 14 days.

Other links:
One of the many famous Ironman "collapses" - the crawl with Sian Welch and Wendy Ingraham, this was for 4th/5th in 1997
In 1982, perhaps the first, and the one that helped create the aura around Ironman, featured Julie Moss losing the race with 50m to run
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Show notes

This week, the UCI's Future of Cycling report, why people believed Tigst Assefa when they doubted Ruth Chepngetich, and whether athletes are asked to take on too much load and risk of harm:

(00:02:11) The UCI proposes 16-day Grand Tours from 2029, teams of seven or six riders, shared media money, budget caps, and GPS tracking of riders and cars. Ross backs most of it, but asks how any sporting governing body knows what its sport really needs when the loudest voices may not be in the majority
(00:17:20) Remco Evenepoel beats Giulio Ciccone to the European title by under three-thousandths of a second, and we explore how a photo finish works
(00:25:23) Can Jacob Kiplimo break the marathon world record in Chicago this weekend?
(00:28:19) Had Assefa broken Chepngetich's record in Berlin, would we have believed her? We compare their career trajectories, the confounding effect of prototype super shoes, and tease a new paper that Ross is involved in, suggesting women benefit more from the shoes than men
(00:41:19) Emma Navarro ends her season after almost three years of under-fuelling and RED-S. How did her team miss it, and what should "normal" feel like?
(00:48:44) Player unions take FIFA to court over fixture congestion. Ross plays devil's advocate, since clubs carry most of the load, nobody has defined how many matches is too many, and nobody really considers the other side of the impact of players being classified as workers
(01:02:01) Jannik Sinner's season is over, and no semi-final or final was completed at the China Open. Is tennis limping to its year end, and what evidence is needed to fix it?
(01:03:31) And finally, Stuart Phillips dismantles a hyped creatine study, and we pick the 2036 Olympic host on tourism grounds alone (Kirsty Coventry, please consider South Africa!)
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Episode guest Dr Ian Gallen is an award-winning Consultant Endocrinologist at Royal Berkshire Hospital, Reading. He is a consultant physician, endocrinologist, and diabetologist whose career has included clinical medicine, research, medical education, and work relating to diabetes, exercise, and sport. His particular expertise is in diabetes, exercise and sport, including the practical challenges of managing diabetes during physical activity and competitive sport.

In this episode, Gallen breaks down the basics of Type 1 and Type 2 diabetes, the latest in management and care, how modern technology is helping sufferers and why there is no reason diabetics cannot play sport at the highest level.

His work has explored the relationship between insulin, glucose metabolism, nutrition and exercise, including the practical management of diabetes in people undertaking intensive physical activity. His clinical experience has included work with athletes and physically active people with diabetes. (Society for Endocrinology⁠)
He has served as a Special Medical Adviser to the London 2012 Olympic Games, with responsibilities relating to medical issues affecting athletes with diabetes. His work in this area has included teaching, lecturing and professional education on diabetes and exercise.

Ian has contributed to publications in diabetes, endocrinology, and exercise medicine, including work on exercise physiology, hypoglycaemia, insulin management, and athletic performance in diabetes.
In 2012 he edited Type 1 Diabetes: Clinical Management of the Athlete, published by Springer. The book addresses the clinical management of athletes with type 1 diabetes and the practical considerations involved in participating in sport. (Springer⁠)
He has also contributed to professional medical literature, including a chapter in the Oxford Handbook of Sport and Exercise Medicine.

Ian has contributed to professional and advisory work relating to diabetes, driving and medical practice. He received the Royal Society of Medicine Gold Medal in 2012 and was appointed Commander of the Order of the British Empire (CBE) in 2019.
He is also a Fellow of the Royal College of Physicians (FRCP) and a Fellow of the Royal College of Physicians of Edinburgh (FRCPE) and holds the degree of Doctor of Medicine (MD).

Ian’s professional interests include the interaction between diabetes, metabolism, exercise and healthy ageing. He is particularly interested in helping people with diabetes participate safely in exercise and sport while managing the physiological challenges of training and competition.

Become a member of The Real Science of Sport to discuss all matters sport, health and performance with fellow listeners. There's even a Diabetes in sport thread. Plus, get ad-free listening and exclusive shows.
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To hear the Ingebrigtsen conversation in this podcast, and every Applied show, become a Supporter. It costs about the price of a coffee a month (or a gel), and also comes with ad-free listening and our Discourse community!

Our Applied shows are normally exclusive to our Supporters. However, the 2026 track and field season has been so good, and given us so many threads to follow, that we've opened up the first part of this one to everyone! The Guardian's Sean Ingle joins us to look back on a year of 17 world records, from Sabastian Sawe's sub-two hour marathon and Josh Kerr's mile record to 17-year-old Cooper Lutkenhaus becoming the youngest ever world champion, and a women's 800m that kept on giving all summer. Sean gives us his inside view on the Ultimate Championships, why World Athletics plans a world championships every year after 2030, why London lost out to Nairobi, why a doping-tainted marathon world record still stands, the brand wars behind the scenes, and whether a skin suit could ever be worth 2.5% over 800m.

Then, exclusively for our Supporters, the show becomes a journey into the mind of one of sport's most fascinating characters. Sean spent a day with Norway's Jakob Ingebrigtsen at his home in Norway, and shares what he learned about his upbringing (serious training from the age of seven), how his talent was shaped, his relationship with running, and the principles that drive him, from 180km weeks and no days off, to his rivalry with Kerr.

Links
The article on the Ingebrigtsen brothers that we discuss in our exclusive segment (full article available to members on Discourse)
Sean's two pieces on Jakob Ingebrigtsen. First, at home with Jakob and "obsession" he feeds
And the second instalment - 10 lessons from one of the world's most beguiling athletes
Epstein's Sports Gene - the best book on nurturing talent (and nature) you'll ever read
The paper that comes up in Sean's Talent discussion, showing that "successful juniors and successful seniors are largely two disparate populations"
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