In TODAY.com's expert tip of the day, a trainer reveals how he uses his daily walks to build and maintain strong bones as he ...

Best TRX exercises for a full-body workout . Do: 6-8 reps of each exercise, then repeat the whole thing through for 2-3 ...

Speaking of power output, stairs work some of the biggest muscles in your body (think: glutes, quads, and calves. Plus, ...