Performance Lab

Testosterone Decline With Age: What Changes After 40

Testosterone Decline With Age: What Changes Aft...

Learn why testosterone drops after 40 and what hormonal changes affect your energy, strength, and vitality. Evidence-based insights for men.

Testosterone Decline With Age: What Changes Aft...

Learn why testosterone drops after 40 and what hormonal changes affect your energy, strength, and vitality. Evidence-based insights for men.

A middle-aged man sitting quietly on a gym bench, resting his forearms on his knees, catching his breath after a strength session

Why Longevity Doctors Now Call Muscle Your Most...

A 2026 survey of more than 200 longevity physicians shows a shift away from trendy biohacks and toward a simpler priority: preserving skeletal muscle. Here is what the doctors are...

Why Longevity Doctors Now Call Muscle Your Most...

A 2026 survey of more than 200 longevity physicians shows a shift away from trendy biohacks and toward a simpler priority: preserving skeletal muscle. Here is what the doctors are...

Workout Performance Decline: Why It Happens & How to Fix It

Workout Performance Decline: Why It Happens & H...

Discover why losing strength in the gym accelerates after 40 and proven strategies to restore your performance and build muscle effectively.

Workout Performance Decline: Why It Happens & H...

Discover why losing strength in the gym accelerates after 40 and proven strategies to restore your performance and build muscle effectively.

A man in his 40s sitting alone on a park bench in early morning light, breathing steadily after a run, looking out reflectively

Is Zone 2 Cardio Overrated? What the Latest Res...

Zone 2 cardio built its reputation as the gold standard for longevity, but new research suggests men with limited training time each week may get more from higher intensity work...

Is Zone 2 Cardio Overrated? What the Latest Res...

Zone 2 cardio built its reputation as the gold standard for longevity, but new research suggests men with limited training time each week may get more from higher intensity work...

Why Do I Get Tired in the Afternoon and How to Fix It

Why Do I Get Tired in the Afternoon and How to ...

Discover why afternoon fatigue hits hard and learn science-backed strategies to reclaim your energy and productivity through the end of the day.

Why Do I Get Tired in the Afternoon and How to ...

Discover why afternoon fatigue hits hard and learn science-backed strategies to reclaim your energy and productivity through the end of the day.

A man in his 40s pausing quietly beside a set of dumbbells in a sunlit room, hand resting on his knee, catching his breath

The New Rules of Strength Training After 40: Wh...

The American College of Sports Medicine released its first major resistance training update since 2009, and it changes how men over 40 should think about lifting weights.

The New Rules of Strength Training After 40: Wh...

The American College of Sports Medicine released its first major resistance training update since 2009, and it changes how men over 40 should think about lifting weights.