Markham Heid is a contributor at TIME. He is the author of The Habit Trap, due out in early 2027. Bethan Mooney for TIME Zumba was born in Colombia in the 1990s, quite by accident. A fitness ...

Fitness is tough. So when someone claims they’ve found a “scientifically proven” shortcut to bigger biceps, better endurance, and a sexier core, we’re usually right to be skeptical. Conventional ...

Dreading the gym? Shake up your fitness routine with a dance workout video instead. Dancing can be an intense workout that burns major calories and builds muscle. The free videos below will show you ...

If you are used to training at the gym, here’s why it may not be safe to do an intense workout during the hottest hours of ...