Related Episodes for Which biomarkers does Tim Ferriss regularly track?

“A later crossover study using a lower weight-based dose found its clearest benefit in reasoning, while several memory, accuracy, fatigue, and sleepiness outcomes did not reliably improve. Routine muscle supplementation and acute sleep-loss research use different protocols.”

“Long-term population research has identified age-independent declines in testosterone in some male cohorts, supporting the view that changes in men's hormonal health can involve more than aging alone. BPA and phthalates can interact with hormone-related biological pathways.”

“In a randomized crossover study of 18 young men with overweight or obesity, ten three-minute walking or squat breaks spaced every 45 minutes across 8.5 hours lowered post-meal glucose exposure more than uninterrupted sitting or one continuous 30-minute walk.”

“Dr. Patrick proposes a general-population allocation in which about half of aerobic training time is vigorous, near 80% of maximum heart rate or higher, with more vigorous emphasis for people who train only two or three times per week.”

“The study she cites did not test a dessert, sugary drink, or habitual added-sugar intake: 74 men completed a standard 75-gram oral glucose tolerance test, after which mean testosterone fell about 25% and remained below baseline at two hours.”

“In later randomized trials, urolithin A improved some laboratory measures of muscle endurance or hamstring strength, but it did not significantly improve key primary outcomes such as six-minute walk distance, muscle ATP production, or peak power.”

“Large treadmill cohorts associate higher measured fitness with lower mortality, while a 46-year study of middle-aged men linked the highest fitness category with about 4.9 additional estimated life-years compared with the lowest category.”

“For all-cause mortality, the researchers estimated that one minute of vigorous activity was associated with a risk reduction similar to 4.1 minutes of moderate activity or 53.2 minutes of light activity. The estimated differences were larger for some specific outcomes.”

“In this clip from Dr. Rhonda Patrick's appearance on The Tim Ferriss Show, she describes VO2 max as a practical measure of cardiorespiratory fitness and explains why vigorous intervals can create a stronger cardiovascular training stimulus.”

“A separate 46-year study of 5,107 middle-aged men linked each 1 milliliter per kilogram per minute increase in estimated VO2 max with about 45 additional days of life expectancy. High-intensity intervals are one practical way to improve VO2 max.”