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Fitness & Performance

Read about fitness, exercise, VO₂ max, body composition, and performance.

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Man in a tank top stretching his hamstring on a railing along the Hudson River, with the city skyline behind him.
Recovery Tools and Tricks: Healing or Hype?
Fitness & Performance
Supplements & Nutrition
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Heart rhythm tracing on a navy grid with arrows marking the slightly different time between each heartbeat.
Heart Rate Variability (HRV): What It Is and How to Use It
Technology & Tracking
Fitness & Performance
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A person checks heart rate on a smartwatch while exercising on a treadmill
How VO₂ Max Testing Personalizes Your Heart Rate Zones
Technology & Tracking
Fitness & Performance
Advanced Testing & Diagnostics
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Membrane potential (mV)
Do you really need electrolytes? The science behind the benefits and who needs them.
Supplements & Nutrition
Fitness & Performance
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An exercise physiologist guides an adult through a standing cable exercise.
Is your exercise program really working for you? Why individualization matters
Fitness & Performance
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Heart Health and Exercise in NYC: How to Start Safely When You Have a Family History of Heart Disease
Fitness & Performance
Medical Insights
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How Do I Stay Healthy Enough to Perform at Work and Be Present for My Family?
Fitness & Performance
Longevity & Optimization
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5 Things That Seem 100% Healthy But Are Actually Dangerous to Your Heart
Medical Insights
Fitness & Performance
Supplements & Nutrition
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Rebuilding Strength After 40: An Evidence-Based Exercise Plan for Busy New Yorkers
Fitness & Performance
Longevity & Optimization
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Living With NYC Air Pollution: How to Protect Your Health Without Changing Your Life
Medical Insights
Fitness & Performance
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Creatine powder and capsules spilling from two black supplement containers onto a dark gray surface.
Creatine Benefits, Dosing, and Safety: A Physician's Guide
Supplements & Nutrition
Fitness & Performance
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What is a Good VO₂ Max Score By Age and Gender? Complete Guide
Advanced Testing & Diagnostics
Fitness & Performance
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What Is VO₂ Max? How to Improve It & Why It Matters
Advanced Testing & Diagnostics
Fitness & Performance
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Rethinking VO₂ Max: Performance, Prediction, and the Pitfalls of Optimization
Fitness & Performance
Advanced Testing & Diagnostics
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