Fitness

Cold and flu season is preventable in large part — not just bad luck. Here are eight habits that genuinely cut your chances of getting sick.1....

Body composition is the actual measure of fitness — not the number on the scale. Two people at the same weight can have radically different health...

Sleep tracking has gone mainstream with smartwatches and apps. But what do the numbers actually mean? Here's how to interpret your sleep data and use it...

Hydration is the most underrated performance tool in fitness. Even mild dehydration (1-2% body weight in fluid loss) reduces strength, endurance, and cognitive function. Here's the...

Vitamin D deficiency is the most common nutritional deficiency in the US, affecting an estimated 40% of adults. Most people have no idea. Here's what you...