Related Episodes for Epigenetic Aging: How old is your DNA?

“The Endocrine Society recommends aiming for testosterone concentrations in the mid-normal range while choosing an approved formulation based on patient preference, pharmacokinetics, formulation-specific effects, treatment burden, and cost.”

“Family-controlled research provides another view. A Swedish cohort of 2.48 million children found small associations in conventional models, but the estimates moved to the null when siblings with different prenatal exposure were compared.”

“A 2025 network meta-analysis of 217 randomized trials and 15,684 people with knee osteoarthritis found that aerobic exercise was likely the most beneficial exercise category for pain, function, gait, and quality of life.”

“Research in trained cyclists found that daily heart rate variability tracked training load and perceived exertion during an overload period, then returned toward baseline during recovery, supporting its use as a sensitive signal when interpreted against an individual's normal range.”

“In this clip from Dr. Rhonda Patrick's appearance on Next Question with Katie Couric, she explains how sustained exercise can improve cardiovascular fitness and the heart's ability to fill efficiently during middle age.”

“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.”

“The 10,000-step target began as a memorable way to market a Japanese pedometer, not as a biological threshold. Walking still matters because replacing sedentary time with movement supports health, and large cohort studies associate more daily steps with lower mortality.”

“Reversing the Cardiac Effects of Sedentary Aging in Middle Age—A Randomized Controlled Trial - In sedentary middle-aged adults, 2 years of regular exercise improved heart function and reduced heart stiffness, potentially lowering future heart failure risk.”

“In the five-year Generation 100 trial, adults ages 70 to 77 completed supervised high-intensity interval training or moderate continuous training, demonstrating that structured vigorous exercise can be feasible in older populations when it is introduced progressively and matched to health and fitness.”