Range of motion is about what you can actively control through your muscles and joints.
In this video, I demonstrate the difference between active flexibility and passive flexibility. Hopefully this helps you take one step closer to achieving your fitness goals safely, and without injuring yourself.
Chris JB is a personal trainer and the owner of My Core Balance, a personal training studio in San Jose, California. We also offer online programs such as Help! I Threw Out My Back and Beginner Weight Lifting.

