The ability to exert force is a good way to define flexibility. The ability to work a muscle for an extended period of time. At various joints, the range of motion is available.
Flexibility is the ability of a joint or series of joints to move through an unrestricted, pain free range of motion.
Basically, flexibility is an important component of physical fitness and has many positive effects on the body. For instance, it improves mobility, posture, muscle coordination, reduces the risk of injuries and muscle soreness
