We all want simple workouts that deliver results, and that's why the 21-15-9 format has become a staple in high-intensity functional fitness. Originally a CrossFit workout, it involves completing one ...

No equipment, no excuses - just a full-body session that hits legs, glutes, core and shoulders in under 30 minutes ...

Research says you can build muscle and strength now without the hassle of bulking ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." A CALORIE SURPLUS isn’t always a bad thing. Do it right and you can juice your activity level while ...