Adding some extra resistance to your strength-training routine can offer the results you're looking for, so bring a medicine ball into the mix! Challenge your whole body and update your workout with the following moves.
There are two variations of this exercise: one for core stability and one for torso mobility. To start, grab a medicine ball that's between five and 15 pounds. Stand with your feet shoulder-width apart, making sure your knees are not locked.
For stability:
For mobility: