Want to get in a total-body strength training workout in just 30 minutes? Grab some dumbbells and let's do this! This interval workout involves pretty basic dumbbell moves, but there's not much rest ...

It's one of the most simple moves but, do it right, and you're in for a whole host of benefits. It's the humble step-up exercise, of course! Or, if you're plumping for the weighted version, a dumbbell ...