Hormones and Endocrine Aging
Testosterone, estrogen, IGF-1, growth hormone, and DHEA all decline significantly with age, driving sarcopenia, bone loss, cognitive decline, and cardiovascular risk. Exercise is among the most effective lifestyle interventions for preserving endocrine function. Hormone replacement therapy benefits depend critically on timing relative to menopause onset and delivery method — the "timing hypothesis" fundamentally changed clinical guidelines.
Viewpoints
Dr. Benjamin Levine: How Exercise Prevents & Reverses Heart Aging
Benjamin Levine
“Exercise is one of the most powerful modulators of endocrine function in aging — preserving testosterone, growth hormone pulsatility, and IGF-1 more effectively than most pharmaceutical interventions, while simultaneously protecting cardiac structure.”
Dr. Peter Attia on Mastering Longevity - Insights on Cancer Prevention, Heart Disease & More
Peter Attia
“Hormone optimization in aging requires considering the full endocrine context — testosterone, DHEA, thyroid, and estrogen interact systemically, and optimizing one axis without monitoring the others produces incomplete and sometimes counterproductive results.”
Key Moments
Stuart Phillips, PhD, on Building Muscle with Resistance Exercise and Reassessing Protein Intake
Stuart Phillips
“Testosterone and IGF-1 decline reduces muscle protein synthesis capacity with age, but resistance training combined with adequate leucine-rich protein can substantially overcome anabolic resistance even in older adults without pharmacological intervention.”
Dr. Peter Attia on Mastering Longevity - Insights on Cancer Prevention, Heart Disease & More
Peter Attia
“The timing hypothesis for estrogen replacement is now well-established — initiated within 10 years of menopause it reduces cardiovascular risk, cognitive decline, and bone loss; initiated later, benefits diminish and risks may increase.”
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Related concepts
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