Researchers from the University of Southern Denmark investigated how eight weeks of high-intensity interval training affect the structure of mitochondria—the parts of muscle cells that produce energy.

Physical inactivity costs the world an estimated USD (US dollar) 53.8 billion each year. Exercise is a simple, affordable, and effective way to reduce the risk of heart disease, especially for people ...

VO2 max measures your body’s maximum oxygen use and relates to longevity and health. Army’s H2F system uses HIIT to improve VO2 max and overall health. Consistent HIIT, 2–3 times weekly, improves VO2 ...

Supervised HIIT and CME combined with resistance training significantly improved physical function in older patients with HIV.

These key strategies can lead to big performance boosts, no matter your age.

View post: Hitting Plateaus? Why Trainers Say You Might Need to 'Periodize Recovery' for Stressful Seasons and Heavy Training Blocks Many weightlifters obsess over their workouts. They cycle through ...

VO2 max is among the most elusive terms in fitness. You may have heard of it, as it’s often heralded as the number that defines your cardiovascular fitness. Yet for many, the concept is confusing and ...

From your 20s to your 90s, see how many cardio minutes truly protect your heart, brain and independence – are you hitting the right dose?

Ahead of the last day of Para biathlon for the Milano Cortina 2026 Games, Germany’s Leonie Maria Walter gives us insights ...

From 'cortisol face' to 'cortisol belly', the internet has turned a vital hormone into a health villain. We uncover the facts behind the fiction ...

Gains are just around the corner.

When you tell people you’re going to see massive sand dunes in Oregon, they’ll probably assume you mean the coast. The Christmas Valley Sand Dunes in Christmas Valley, Oregon are nowhere near the ...