Do This Simple Arm Warmup Before Any Upper-Body Workout

CARs, or controlled articular rotations, work on your joint mobility and range of motion and are important to do before any workout. This video shows a quick, full-body routine to activate every muscle and joint, but you can use the first half as an upper-body warmup. Pay attention to your body as you go through it — "some people have injuries or restrictions that might result in a limited range of motion," Letchford says.