Essentials: How to Exercise for Strength Gains & Hormone Optimization | Dr. Duncan French

About this video

Performance scientist Dr. Duncan French discusses how resistance training interacts with hormones. Dr. French attributes acute testosterone release in part to mechanical and metabolic stress and sympathetic arousal involving catecholamines, the HPA axis, and cortisol. He explains that in women, testosterone released during weight training comes through the adrenal glands, while in men the field remains divided on the relative roles of adrenals versus gonads for acute responses. Dr. French notes testosterone acts on many tissues, including tendon, ligament, and neural tissue, not just muscle. On recovery, he advises periodizing cold exposure: he argues cold can dampen the mTOR hypertrophy pathway during a muscle-building phase, while aggressive recovery is more appropriate in a competition phase when technical execution matters most. He also recommends judging a training change over roughly three months and logging training, mood, and sleep.

Key takeaways

• Dr. French links acute hormonal responses to mechanical stress, metabolic stress, and sympathetic arousal.
• Dr. French says testosterone from resistance training in women comes through the adrenal glands.
• Dr. French advises avoiding ice baths when the goal is muscle growth because cold can dull hypertrophic signaling.
• Dr. French recommends using aggressive recovery tools during competition phases instead.
• Dr. French suggests most training adaptations will show progression or regression within three months.

Episode details: published September 18, 2025 · 142.4K views · 34:57 long. Summary written by Self Growth Videos from the episode itself. The science and protocols described are Andrew Huberman’s, presented for education — not medical advice. Consult a qualified professional before changing your own health practices.

← Previous: How to Expand Your Consciousness | Dr. Christof Koch · Next: Build Your Ideal Physique | Dr. Bret Contreras →

All Andrew Huberman videos · Andrew Huberman profile · Huberman Lab (official site)