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Show notes

This week on the Spotlight, we dive into the latest Discourse Digest, unpacking talking points in the news.

We begin with the Tour de France Femmes, where Pauline Ferrand-Prévot sealed a dominant win, and then her open discussion about intentional weight loss to improve climbing performance sparked wider conversation. Ross and Gareth explore the science and the risks, contrasting PFP’s short-term approach with Demi Vollering’s “health first” philosophy. We learn from other athletes about "body composition periodization" and share some caution, but also recognition, that elite athletes do "go there" for performance.

In track, a new teen sensation has arrived: Cooper Lutkenhaus, just 16, stunned the world with a massive U16 World Record to finish second at the USA 800m trials. He is already the real deal, but that's no guarantee that he's not another star whose flame might flicker. We talk performance trends, hype, and the pitfalls of early stardom.There’s also some heat on the track—of a different kind—as sprinters Noah Lyles and Kenny Bednarek engage in a bit of spicy back-and-forth. Genuine beef or PR play? Either way, it’s getting people talking.

Then we turn to IV drips—vitamin infusions marketed as wellness boosts. Ross and Gareth aren’t buying it, calling out the pseudo-science, health risks, and the doping red flags. We also tackle criticism of World Athletics’ SRY gene screen for eligibility in women's athletics. Ross breaks down what the critic got wrong and why women’s sport deserves constructive criticism and alternative solutions rather than unproductive, false dismissals of proposed solutions. A lively disagreement ensues - let us know your thoughts!

And finally—smelling salts banned in the NFL. Players are upset, but should other sports follow? Tune in for all this and more.

Links

• PFP and Vollering talk about weight, performance and health
• Trent S' paper on body composition periodization - how to do it: short term, controlled and fully aware of the risk factors
• Letsrun recap of the US Trials
• The article critical of the SRY screen. Let us know what you think, constructive or destructive criticism?
• The IV drip discussion on Discourse, for members only (join now!)
• The NFL bans smelling salts (fineprint here - teams can't provide them, players can still use)

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Multiple African Champion, Commonwealth Games medallist, Olympian, multiple Giro Rosa podium finisher and one of the most experienced riders in the women's World Tour, Ashleigh Moolman-Pasio has seen it all. In a pro career that has spanned over 15 years, Moolman Pasio has been a force in virtually every format, from Grand Tours to one-day classics and in e-sports racing, where she was world champion in 2020. In the aftermath of the 2025 Tour de France Femmes avec Zwift, Moolman-Pasio weighs in on the current status of women's cycling, explains how so much has changed in her time on the tour, how Zwift competition is regulated to ensure fairness, why the UCI's rules around bike weights doesnt work for women, how having an holistic approach to rider welfare at pro level will ensure better results and why the Covid pandemic proved to be a blessing for the women's sport.

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Show notes

In this episode of the Real Science of Sport Spotlight, we start with a Discourse Digest that looks back at a men's Tour de France that fizzled out, with tactical inertia exposing the gulf in performance and power to a dominant, ultimately barely challenged winner. We unpack race highlights, where it dwindled, and why the drama never truly arrived. Meanwhile, the Women’s Tour is heating up, despite Demi Vollering’s crash grabbing headlines The GC battle remains alive as tensions rise between rival teams over safety and entitlement.

Concussion is in focus again (22:37), from both cycling and rugby, with Gary Ringrose’s self-withdrawal from Lions selection earning praise. We explore what this means for the culture of player welfare, how common this behaviour actually is, and how instrumented mouthguards could shape the future of concussion management.

In Center Stage (35:46), we revisit our recent episode on fitness and training load, fuelled by great listener questions from our Discourse community. From the impact of life stress to the limitations of single-metric monitoring, we explore the complexity of training management, and why triangulation, not for the first time, is key.

That theme continues in Listener Lens (55:07) with a dive into a fascinating listener question from John: why does heart rate drop when we’re fatigued? The answer lies in the the balance between two parts of our nervous system, and a brain that might not let us activate muscle. This opens up paradoxes around efficiency and fatigue, and how we react to early signs of overtraining.

And Finally (1:05:13), we discuss the hype and hazards of young athletic prodigies, inspired by a 12 year who nearly won a medal at the Swimming World Champs. But cautionary tales about. We end by asking whether 10,000 steps a day is really necessary—or if Gareth’s dad can get by with 7,000? You'll find that...it depends!

Links to stuff we spoke about!

• The war of words between FDJ and Visma after the Vollering crash
• Ellen van Dijk's retirement announcement
• Discourse members only: Discussion about Ringrose concussion, and Ross' discussion about the IMG use for such cases in future
• Here is Discourse Member Gerald's outstanding post on fitness scores and training stress. Originally on Discourse, I've put this in the public, just for everyone's benefit, and as a teaser to see how fab and smart our listeners are! For more of the same, you know what to do!
• 12 year old nearly reaches World Champs podium

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TSS, Relative Effort, Fitness Score... Confused by all the numbers and what they mean? Mike and Prof. Tucker delve into the details of what defines fitness, how it is measured, the factors that influence fitness and how apps like Strava utilise metrics to provide a fitness score. But what do all the numbers mean, and how can we use them to understand our training better, get fit and peak just at the right time for an event?

Discourse

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This week's Spotlight kicks off on the roads of France with a fast-paced Discourse Digest. Remco Evenepoel’s withdrawal sparks a discussion about whether he's fully healthy, or if affected preparation and fuelling challenges might account for his underperformance. Jonas Vingegaard seems to have narrowed one gap to Tadej Pogačar, only to find another expanding on the high-altitude climbs. Ross explains how their previously complementary strengths and weaknesses have evolved into a straight race with, so far, one winner. We also tackle Quinn Simmons’ controversial claims about motorbikes aiding Tim Wellens' stage win—ungracious perhaps, but correct and backed by aerodynamic science.

In Center Stage (29:20), we dive into doping, the media, and trust in sport. Ruth Chepngetich’s diuretic case prompts a wider debate: what are media entitled to ask, and what responsibility do they bear in keeping sport honest? Is asking about doping unfair, or essential? A lively debate on Discourse spills over into the Spotlight!

In Ross Replies (55:56) we take on Discourse member Larkim’s question: should sports equipment be modified for women? From volleyball to athletics, we explore where it already happens, and why more sports might benefit from doing the same. But what do women think, and how should sport consider the sometimes conflicting opinions on this issue?

And Finally (1:07:20) a study of over 5,000 runners reveals that injury risk spikes after a single big jump in distance—not a gradual increase—reshaping how we think about training load.

Links

• Quinn Simmons on motorbikes and Tim Wellens' response
• The Aerodynamic paper on motorbikes and cycling performance
• Article translating the aerodynamic paper for a lay audience
• Discourse members only - discussion about Chepngetich, as featured in Center Stage
• The paper on single session running distance as an injury risk factor

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In this episode, we dive into the intersection of the menstrual cycle and athletic performance—a topic often surrounded by strong opinions but surprisingly limited evidence. Joined by Dr Kelly McNulty, researcher and practitioner, and Sarah Massey, experienced coach, we break down the key phases of the cycle, highlight when ovarian hormone levels rise and fall, and explore the popular theory that certain types of training should align with these hormonal shifts. But does the science actually support that idea?

Together, we take a critical look at the research—what’s known, what’s still unclear, and where the gaps are. More importantly, we focus on practical, athlete-centered approaches: being symptom-led, being "your own scientist", using tracking tools effectively, and how to open the conversation—especially with younger athletes—in a way that empowers and informs.

Whether you're a coach, practitioner, or athlete yourself, this episode offers a grounded and positive perspective on managing training around the menstrual cycle without falling for the hype.

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Links

• One of Kelly's papers that summarizes the literature and shows a trivial impairment during the early follicular phase
• Paper showing that the anabolic response to resistance training is unaffected by menstrual cycle phase
• Kelly's study on symptoms experienced during menstruation and their perceived effects on training and performance
• Researchers raise the bar for studies on the menstrual cycle by calling for measurement, not guesswork
• "No influence of influence of women's menstrual cycle phase on acute strength performance or adaptations to resistance exercise training"
• Another of Kelly's papers, this one summarizing the literature on the effect of oral contraceptives on exercise performance
• Developing a tool for ovarian hormone profile classification
• Kelly's educational resource, Period of the Period

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In this emergency bonus episode, Ross reacts to the bombshell news: Kenya's Ruth Chepng’etich, who stunned the world with her record-breaking marathon in Chicago last year, has been provisionally suspended by the Athletics Integrity Unit after testing positive for a banned diuretic in March. The performance shocked the running community at the time — questions and doubts sparked a parliamentary inquiry in Kenya after a journalist’s pointed question at the press conference. We even released a podcast titled “Too Good To Be True?” analyzing the run.

Now, that skepticism feels vindicated. Ross breaks down why the doubts were justified despite the usual defenses ("she's always been talented", "she worked hard"). He explains what a diuretic does, why this kind of doping bust leaves him cold and underwhelmed, and how it fits a familiar pattern in elite sport. We also explore the shadowy roles of agents and coaches — and ask why it's always the athlete left holding the bag?

Finally, Ross reflects on the cycle of hope, hype, and heartbreak that defines modern sport — from the marathon course to the Tour de France, can we trust what we see? Why should we, when the characters and incentives remain the same? Same script, different stage.

Links

• The AIU statement on Chepng'etich's provisional suspension
• The timeline as posted by Chris Chavez on X
• Our podcast on the performance at the time - we were highly, highly skeptical
• The Discourse thread at the time of that performance - members only
• The Discourse thread that is growing now, out of the announcement last night - members only

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In a packed episode of Spotlight, we kick off with a Discourse Digest that begins on the grass of Wimbledon, where Jannik Sinner and a dominant Iga Świątek took home the titles. Then it’s to the rugby fields of South Africa, where the Springboks—led by the ever-innovative Rassie Erasmus—have once again found a tactical edge. But is it genius strategy or a rule-bending loophole?

In Center Stage (17:10), the Tour de France is in focus. Jonas Vingegaard's muscle has matched Pogacar on short, punchy climbs, but can he hold his own as the race hits the high mountains? We also break down Remco Evenepoel’s pre-race cooling technique - placing hands and forearms in ice water - to explore what the science says about its effectiveness. Plus, we revisit the ongoing issue of concussions in cycling to explain the paradigm shift that is needed to buy space and time for better concussion identification.

In Ross Responds (52:07), we revisit the topic of cramp and sodium loss, answering a listener question about 'salty sweat' with a dive into how our bodies prioritize the regulation of sodium concentration, and why sweat testing is nothing more than a measure of the body's systems working to defend physiological 'normal'. In Listener Lens (1:00:10), Tim is looking to break a barrier over 10km, and our Discourse community zeros in on the key to unlock that performance: pacing. We offer some advice to help him nail it.

And finally (1:06:53), a Zwift racing series has Ross questioning the platform’s 'fairness'. Are the game's efforts to simulate equipment and drafting creating more distortion than accuracy?

Links

• Article on South Africa's innovative midfield maul set up
• Stanford study that finds that palm cooling (with a vacuum device) improves performance in bench press and pull ups. Too good to be true
• Conversely, study showing that palm cooling does not improve interval running performance
• And conversely again, study showing that immersing the hands and forearm in cold water improves sprint performance
• Healy's power numbers from the day, the trigger for our IF discussion
• Cycling's concussion policy
• For Discourse members only, Tim's question about his 10km quest and discussions on improving pacing
• Discourse members talk cramp

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It's time to pour yourself some pickle juice and suck on a salt tab (or is it?) as we talk exercise-associated muscle cramps (EAMCs) - one of the most complex, and common, afflictions facing athletes. Difficult to research and predict, the causes of EAMC's can be varied depending on the individual, as are the solutions to fix them. In this episode, Prof. Ross Tucker and Mike Finch break down the most common theories around causes and then discuss the best long-term, medium-term and immediate solutions (yes, there are some!) to preventing this painful condition.

Discourse

Join Discourse now, and become part of the growing community whose stories and testimonies inspired much of the content of this (and other) podcast! You do so by making a small donation here on Patreon, and then the world of sports science insight and opinion will be yours!

SHOW NOTES

The cramping thread on Discourse - members only

An Evidence-Based Review of the Pathophysiology, Treatment, and Prevention of Exercise-Associated Muscle Cramps

Similar review on cramps

Study showing how pickle juice works fast in low doses, via a neural reflex

Ron Maughan paper on muscle cramps, contrasting the hydration model with the neural theory

People who cramp have similar sodium and other electrolyte levels to those who don’t cramp

If you drink more, your sodium levels drop, even if you drink an electrolyte containing drink

A paper that compares the two leading hypotheses for cramps: 

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The show

This week on The Real Science of Sport Spotlight world records fall and big questions rise. Faith Kipyegon and Beatrice Chebet lit up the track in Eugene—how fast can they go, and what happens if (or hopefully when) they clash over 5000m, 3000m, or possibly even 1500m? Their record-breaking performances headlined a meeting that showed track and field can be exciting, modern, and appealing to younger fans. Is the sport in better shape than critics thought? From spikes to strings, we then turn to Wimbledon, where Electronic Line Calling has come under fire. Is the system flawed, or just misunderstood? We break down the tech, the myths, and why perfection was never the point.

In our Center Stage (27:44), we focus on the Tour de France, where concussions, broken bones, and questions of responsibility have again reared their head. Do race organizers or riders bear the blame? We explore the UCI's priorities, enforcement of their own rules, and creation of new rules with marginal benefits. We also discuss the race. Jonas Vingegaard says he’s heavier, more muscular, and more powerful than ever. Will that close the gap to Pogacar? The early signs, after the Stage 5 TT, suggest an emphatic "no"? Is he solving the 'wrong' problem, and how will that increased mass play out against a relentless Pogacar in the mountains?

We also Spotlight listener insights in Ross Replies (52:00), with a focus on David Roche’s Western States DNF and his pre-race transparency. You wondered whether he created mental and emotional pressure on himself by being so open, and we discuss. In Listener Lens (58:25), we celebrate some Discourse success stories. And finally (1:02:16), are endurance athletes more likely to have daughters? A quirky study suggesting so closes the show.

Links

• USADA statement on the father and son banned for testosterone use
• Guardian article on the tech failures and player mistrust of electronic line calling
• Strong criticism of the UCI/ASO for a hazardous stage finale in the race
• The Michael Woods Tour diary in which he describes the ASO approach to safety, including his thoughts on how to improve safety
• Vingegaard's comments about his power, weight and performance prospects
• Are athletes getting older - for DISCOURSE only, Max's amazing analysis on age of elite athletes over the years
• Endurance athletes are more likely to have girls - the quirky paper we finished on

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