Shownotes

David's work

• 01:25 -
  The brain and body operate as a single system, yet traditionally sport performance has been framed primarily around physiology, with the brain treated as secondary. In reality, the brain regulates far more than movement. It controls coordination, decision-making, focus, emotional regulation, fatigue perception, and recovery.
• In high-performance environments, what separates athletes is not physical capacity alone but how efficiently the brain processes pressure, adapts under stress, and executes skill, sometimes automatically and sometimes with considerable conscious effort.
• From a neuroscience standpoint, elite performance depends on efficient neural pathways built through repetition and experience, with the brain becoming progressively better at predicting movement, filtering distractions, and making rapid decisions under fatigue.
• One practical way to work on this is a go/no-go task, a brain training exercise delivered while the athlete is already physically fatigued. It targets the specific brain areas involved in decision-making under load.
• What produces the benefit is not the exercise itself but how the athlete perceives and responds to that cognitive stressor in a state of high fatigue.

Work application

06:10 -

• Neuroplasticity is a widely used term right now, and what it actually means is that the brain changes in response to experience.
• That change can be positive or negative. Training the brain into a state of high anxiety is just as possible as training it toward better performance.
• The capacity to develop these neural qualities exists across all athletes, not just the elite.

Carbs and the brain

07:45 -

• Two things are happening here. First, there is a direct neural pathway between the tongue and the brain, and the brain does not actually need to receive carbohydrate for cognition to improve.
• As long as it perceives that carbohydrate is incoming, the response is triggered. There is a genuine placebo component in that.
• Second, beyond the placebo, higher glucose availability does appear to make neural pathways more efficient at sustaining muscle firing, which would explain the performance gains seen in long endurance events even when the additional carbohydrate is not being fully oxidised or meaningfully sparing muscle glycogen.
• That said, the very high intakes seen in professional cycling and triathlon, sometimes reaching 180 grams per hour, are matched to the extraordinary power outputs and heat exchange demands of those athletes.
• For an amateur attempting to replicate those numbers without the corresponding output, the most likely outcome is gastrointestinal distress. A ceiling of 90 grams per hour is a sensible target for most amateurs in longer events, with 120 reserved for those with meaningful output levels.

Amateur stress load

10:55 -

• The relevant concept here is allostatic load, which refers to all the stress that exists outside structured training: work, relationships, children, and every other non-performance demand on daily life.
• A professional athlete's role is to produce performance, and their schedule is structured around recovery.
• An amateur carries a far higher allostatic load on any given day, which has a direct effect on what the nervous system can absorb and respond to.
• For that reason, the primary metric for an amateur should be health rather than performance output in isolation, and the right question is whether training is genuinely delivering wellbeing, not simply whether it is hitting a number.
• Exercise itself is one of the most effective ways to reduce allostatic load. Dopamine and serotonin, released during physical activity, mediate cortisol levels in the brain, which reduces the felt weight of accumulated stress.
• Provided recovery is sufficient to support the physiological adaptations you are after, exercise in general works against the stressor, not with it.
• The timing of training within the day matters too. Training after a long day of sitting compounds the problem, since prolonged inactivity changes the way physical output is delivered.
• Understanding that context, rather than simply pushing through, allows an athlete to ask the right questions before a session starts: where am I in the day, what is my stress level, and what does a good session actually look like from here?
• For a non-essential session, the most valuable thing may simply be enjoyment, since that is what the activity is for.
• For a targeted session, the question becomes what is specifically needed to engage enough to deliver on that intention.

Tackling perfectionism

16:38 -

• Even at elite level, not every session is great. The expectation that every amateur session must be perfect is an extension of the same perfectionist trait, applied from a completely different starting point.
• What is actually needed is precision relative to where you are at that moment: do the session as well as possible given all the conditions that exist as you begin it.
• If you cannot get through it, recognise that this will not be the difference between winning and losing. What it will affect is how well you recover, which is the more consequential variable.
• Perfectionism is worth examining because sport tends to surface the traits that need work. The way through it is self-regulation: understanding where the body and mind are at any given point in the effort and asking honestly whether a given output is achievable, and whether falling short is acceptable.
• Perfectionism can be an asset early on, providing the drive needed to become a good endurance athlete, but it tends to become a liability over time.
• One useful frame is to notice all the compensations already being made elsewhere in life, whether that is time taken from work, from family, or from other commitments.
• If those compromises are accepted without question, the same tolerance should apply when a training session does not come together as planned.

Race-day decisions 

21:35 -

• Pacing, nutrition, hydration, and responses to unexpected situations are all decision-making problems at their core, and the brain is making thousands of small decisions every second throughout a race.
• Pacing specifically comes down to duration, path, and outcome analysis: how long can I sustain this effort, and is that a viable option given what I need to do?
• When the brain concludes that the effort is not sustainable, perceived effort rises and the efficiency of muscle firing drops as a result. A calm response and controlled breathing are part of managing that.
• The fatigue-based brain training exercises described earlier feed directly into this.
• Understanding why the body and brain are behaving as they are under fatigue leads to higher quality decisions more consistently.
• What matters is not whether mistakes are made within the task, but how quickly composure is recovered and the next part executed. That same dynamic plays out in race pacing.

Brain training basics 

24:15 -

• One commonly used exercise is the Stroop task. A colour word appears on screen, and the task is to identify the colour of the text rather than the word itself.
• When the word and the colour match, the response is fast. When they do not, the brain takes longer to resolve the conflict.
• That slower, incongruent version is the training stimulus. There are many variants covering concentration, attention, and task switching, and the appropriate one depends on where the individual is actually deficient.
• After a set of intervals, one to three minutes of the task fits naturally into the recovery window. Up to five repetitions per session is a reasonable volume.
• The focus should not be on task performance but on noticing the emotional response: frustration, anger, or agitation within the task are signals worth examining.
• The question to ask is why that response is arising and how to settle it to execute the next attempt as well as possible.
• Individual response time varies considerably, with some athletes developing a clear sense of the effect within two sessions and others taking two to three months.
• Brain endurance training specifically targets the neural pathways involved in decision-making under fatigue, with the aim of strengthening those pathways over repeated sessions.
• The approach described here engages exactly the same pathways but the emphasis is on how the athlete delivers performance over time rather than on training the pathways as the end goal.
• The distinction is subtle. In field conditions, there is no clear evidence that brain endurance training increases overall endurance performance.
• The foundational work in this area, done by Samuele Marcora, is centred on perceived effort and cognitive fatigue, specifically on how cognitive fatigue accumulates and how it can be reduced across a training block.

Reducing cognitive load 

30:30 -

• The research is detailed that any level of cognitive fatigue increases perceived effort and reduces endurance performance.
• Rather than working to reduce cognitive fatigue after the fact, the approach is to minimise cognitive load across all aspects of the period leading into a race. In a Grand Tour context, reducing the cognitive load on a key rider in the first two weeks results in lower perceived effort and greater capacity to perform in the third week.
• Practically, that means managing media commitments, adjusting how the athlete is presented publicly, and organising team operations to reduce the pressure directed at them.
• The defending team has to work in the first 200 kilometres of every stage, which is a physiological cost as well. Both dimensions point in the same direction.
• On social media specifically, removing it entirely is not the preferred approach, because it strips the athlete of autonomy.
• The better option is to offer recommendations, whether that means moving access to a laptop rather than a phone, or handing the profile to a trusted person. 
• Athletes are independent contractors, and a team should not be dictating what they do with their own public presence.
• There is also a wide range of practice across teams when it comes to how much control is exercised over an athlete's daily life, including nutrition.
• What appears from the outside to be an obsessively controlled environment is not always what it looks like in reality, and the reverse is also true. The actual picture varies considerably from team to team and athlete to athlete.

Finding joy and recovery 

36:30 -

• For an amateur the challenge is more complex, because family and other commitments cannot simply be reorganised around a race.
• The most effective reducer of cognitive load, and of cortisol more broadly, is genuine happiness.
• Laughter, enjoyment, time spent doing things you love: these are the best tools available, and the brain does not distinguish between sources of joy.
• This is not a race-week intervention. Happiness functions as a chronic recovery tool. A session done after a genuinely restorative afternoon will be better than one done after a draining one.
• Social media is worth examining here. It provides very short-term stimulation through colour, movement, and novelty, which makes it feel rewarding, but the effect is brief and the underlying cortisol picture does not improve.
• Spending time with people whose company you genuinely enjoy is a different matter entirely.
• That releases oxytocin and has a real recovery effect, and the same advice applies to elite athletes.
• The inverse is also true. Some athletes need solitude rather than company to recover.
• A rider who found himself in the yellow jersey for the first time was so overwhelmed by the experience that what he needed most was an hour alone. 
• The solution was simply to send him out of the hotel at 6:30 in the morning to sit on a park bench by himself, the only time in two weeks he had been alone.
• Knowing yourself well enough to identify what actually returns you to a calm, controlled baseline is the foundation of this kind of self-regulation, whether you are racing the Tour de France or fitting training around two children and a full-time job.

Non-essential training 

43:00 -

• Not every session needs to feel like you have gone to your limit. Consistently training that way is a reliable path to fatigue, both physical and psychological.
• Most experienced athletes understand they should not train hard every day, but the less intuitive version of the same principle is that easy sessions do not need to be productive in any structured sense either.
• Going out for a run without checking pace or heart rate, riding without doing cadence drills, swimming without a set purpose: sometimes the value of a session is simply that you enjoyed being out there.
• A useful illustration of this involves a reigning world champion mountain biker who was struggling to complete sessions under a very high training load.
• The session in question was a four-and-a-half-hour ride, and the instruction was to find five things on familiar roads that had never been noticed before and send photos of them.
• One of those things turned out to be an entire house that had simply never registered.
• At the highest level of performance sport, the head unit becomes the entire field of vision, and the original reason for doing the activity, the environment, the movement, the enjoyment, disappears entirely.
• Reconnecting with why you started, whether that was for the feeling of improvement, for competition, or simply because you loved it, is what sustains motivation over time. When that enjoyment goes, motivation follows quickly.

Self-efficacy and regulation

46:45 -

• The two that come up most often are self-efficacy and self-regulation.
• Self-efficacy is the belief in your ability to perform at a given level. It is more specific than general confidence, tied directly to the targeted activity.
• Many athletes find themselves unable to believe they can do something that all available evidence suggests they are capable of. That gap between capacity and belief is a persistent problem.
• Self-regulation is the ability to monitor and manage your own thoughts and behaviours, including how they affect the people around you.
• An athlete who does not understand why their body is behaving a certain way, or why they abandoned a session, has no foundation from which to adapt.
• If a session is cut short and the reason is not examined, the default conclusion is that something is wrong with the athlete's ability. 
• Motivation and confidence fall as a result. If the same athlete pauses and recognises that their two-year-old was ill all night and they had no sleep, the picture changes entirely.
• The self-regulation piece is what allows that kind of honest accounting to happen, and without it, small setbacks accumulate into larger confidence problems.
• The self-regulation problem often surfaces through the coaching relationship.
• An athlete comes back from a failed session convinced something is wrong with the training, redirecting blame toward the coach, when in reality the root cause was a poor night's sleep, missed nutrition, or late work commitments. 
• Because the athlete has not connected those dots, that information never reaches the coach either, and the session cannot be contextualised or adjusted. The fix starts with the athlete asking honestly: why is this happening, and what external factors might explain it?
• Self-efficacy works differently. The question is simpler: do I have the ability to do this, yes or no?
• When the answer is yes but the belief is absent, the task is to identify what is creating that gap and then communicate it, whether to a coach, a partner, or anyone else involved in supporting the training.
• The brain generates "what if" scenarios as a protective mechanism, offering a way out in case of failure.
• The more emotionally attached an athlete is to a particular outcome, the stronger those signals become, and neuroplasticity means the brain can reinforce that anxiety loop over time.
• The response is to regulate the emotion rather than suppress it: acknowledge it, ask whether it is justified, and where possible create calm by returning to concrete evidence of past performance.
• A practical approach to that is to identify the two or three best sessions from each discipline in the training block leading into a race, and anchor on those moments when doubt arises.
• This works because it activates well-formed memory schemas in the brain, reinforcing the neural pathways associated with confident execution.
• The internal logic becomes: I have done this before, I know how it feels, and I am capable of delivering it again. That shift from fight-or-flight into a calmer state is exactly what is needed in the days and hours before a race.

Further reading and wrap-up 

55:22 -

• For anyone wanting to go deeper on the topics covered in this episode, Samuele Marcora's work on perceived effort and cognitive fatigue is scientifically rigorous and worth exploring.
• On the joy and happiness side, professional athletes Kate Courtney and Chelsea Sodaro are both good examples of athletes who have made enjoyment a visible part of how they operate.
• For popular science reading, Alex Hutchinson's book Endure covers many of these themes, and Alistair Brownlee has a more recent book that is also worth looking up. Matt Fitzgerald's work on the mental side of endurance performance is another solid reference.

LINKS AND RESOURCES

• Psychobiology of fatigue during endurance exercise - book chapter containing much of the seminal work of Prof. Samuele Marcora. For more related research and science, see Prof. Marcora’s ResearchGate page here, and listen to my podcast interview with him here.
• Mark Cavendish: Never Enough - Netflix documentary in which Dr Spindler makes an appearance
• Endure: Mind, Body, and the Curiously Elastic Limits of Human Performance - book by Alex Hutchinson
• How Bad Do You Want It?: Mastering the Psychology of Mind over Muscle - book by Matt Fitzgerald
• Relentless: Secrets of the Sporting Elite - book by Alistair Brownlee