What is Extension and Flexion?
Flexion and extension are positions that your body are in when you lift weights. When a body part has less of an angle, this is called flexion. Basically, the body part is flexed. For example, when you are lifting a dumbbell and your hand comes close to your bicep that is flexion. Extension is the opposite of flexion. For example, if your arm straightens out with that same dumbbell you are creating extension with your arm muscles.
