Podbit · The Diary Of A CEO with Steven Bartlett
In a landmark study, participants given 20g of creatine before a 90-minute Stroop test — where you must name ink colours while reading conflicting colour words — showed statistically significant improvements in both speed and accuracy. The Stroop test is one of the most cognitively fatiguing tasks used in creatine research.
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At 34:53 · chapter starts 28:40
A healthy brain self-synthesises creatine. Under stress or sleep deprivation, 20–30g acutely is needed. German study: 30g offset cognitive decline after 21-hour sleep deprivation.
The brain weighs about 2 kilograms but consumes 20% of the body's total daily energy at rest.
A rested brain makes enough creatine on its own. But sleep deprivation, time zone shifts, exam pressure, and high-stakes performance all create metabolic stress that depletes brain creatine faster than it can be synthesised. At 20–30g acutely, supplementation crosses the blood-brain barrier and partially restores cognitive performance.
A study giving 30g of creatine to volunteers sleep-deprived for 21 hours showed it increased brain creatine levels and offset cognitive decline.
Self-help fails because people are sold one universal cure by the hyper-responders who had a transformative result from it. The real problem is context: every method works for the right person at the right time, which is almost never you just because the author says so.
Spencer Greenberg was once so socially anxious his heart pounded just approaching a stranger. His therapist gave him homework: go to a bar alone, talk to 5 strangers. Starting with asking for the time, he worked up to asking men for hugs — and his anxiety fell dramatically in 6 months.
A person who flies regularly but obsessively checks weather forecasts before every flight is not doing exposure therapy — they're teaching their brain that flying is only safe with the ritual. Safety behaviors prevent the brain from ever learning that the feared thing is actually fine.
The worry-time technique assigns all worries to one scheduled slot (e.g. 5 PM). Every time a worry surfaces, you write it down and ban yourself from engaging with it until that time. When 5 PM arrives, most worries feel trivial and the act of batch-worrying exposes how little it actually accomplishes.
In a randomized study of 20 habit techniques, 'habit reflection' stood out: recall a past habit you successfully built, write down what helped you succeed, then apply those same strategies to your new habit. It works because it's self-adapting — it uses whatever worked for YOU.
The tiny habits technique — always having a minimal version of your habit you can do when life gets in the way — keeps the mental machinery of habit formation from breaking. Paradoxically, people given a tiny-habit fallback option were MORE successful at the full habit, not less.
Fears and worries act like playground bullies — they want to ambush you. But when you deliberately seek them out and choose the time of engagement, they lose their power. The volitional act of starting the fight on your own terms is one of CBT's most underappreciated insights.
Most downtime defaults are things you regret immediately after — phone scrolling, binge TV. 'Glad you did it' activities meet the same need for rest but leave you feeling like you spent your time well. The switch from a bad screen to a documentary, a book, or a walk costs almost no extra effort but compounds into identity over time.
You rarely control your first reactive thought. But you can train your second thought — the response to the trigger — by asking whether your initial reaction is the most helpful one and replacing it with something equally true but more constructive. Over time, that second thought becomes automatic.
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