Medically reviewed by Jennifer Steinhoff, MDThe lumbar spine includes the five vertebrae in your lower back numbered L1 to L5 ...

Now when you're up here, focus on squeezing your upper back muscles, the ones in between your shoulder blades. Your feet should be right about shoulder width apart. We're going to do these ...

your elbow joint has two muscles that move your forearm up or down. These are the biceps on the front of the upper arm and the triceps on the back of the upper arm: to raise the forearm ...

Pulling movements activate the muscles in your upper and middle back that help counteract the forward-pulling effect of dominant front-body muscles. If, like most people, the movements of your ...