It's no secret that Brie Larson is superhero-strong, and we're constantly floored by the glimpses we get of her training regimen. We're talking weighted push-ups, pull-up holds, kettlebell windmills ...

To build lower body muscles, squats, deadlifts, or lunges are among the most popular exercises. However, a piece of equipment that should be present in most gyms is often overlooked: the weight sled.

Eccentric exercise involves lengthening muscles which increases size by adding stress. Concentric moves shorten muscles for gains with less soreness.

You can get the same workout and build strength without heavy equipment. But it takes work. By Christie Aschwanden Many people believe that to build strength you either need a set of weights or a gym ...