Dr Aaron Holley argues that skeletal muscle — not just heart and lungs — is a key, often missed driver of activity ...

Get the facts about cardiovascular exercise and which activities can benefit your heart, help you lose weight, fight disease and more.

Cyanobacteria—ancient microbes that oxygenated Earth and made complex life possible—are still revealing surprises billions of ...

In a clinical trial, researchers studied how aerobic exercise shapes the biology of stress. The study showed that adults who ...

Photosynthetic bacteria helped shape planet Earth. Among them are cyanobacteria that produced the oxygen in the atmosphere ...

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A month-long rucking challenge improved the author's posture and overall fitness. Rucking offers low-impact cardio, ...

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In the excitement of trying new interval workouts and setting fitness goals to get faster, zone 2 running might get pushed to the side. But if you don’t spend enough time keeping your heart rate at ...