This simple floor exercise is redefining how Americans train their core—without crunches, machines, or strain on the spine.

Muscle strains are an unfortunate inevitability for active people. Sooner or later, everyone will deal with a muscle strain that seemingly appears out of nowhere. So it makes sense to develop a system ...

Experts share the exact muscles you should work and exercises you should do to reduce (and prevent) common back pain and injuries.

Leoni Jesner is a fitness, health, and lifestyle writer who has contributed to Byrdie and LIVESTRONG.com, among other publications. She is also a personal trainer, mat Pilates instructor, and ...

Here’s how to do each.

Get stronger without straining your knees, hips, or shoulders.