Stability & Range of Motion Answers

Unlike fixed joints or cartilaginous joints, where the bones are connected by either connective tissue or cartilage, the bones in synovial joints are not directly joined by anything, which allows for a much greater range of motion.

Women generally have a lower center of gravity than men, which contributes to greater stability. Men generally have more muscle mass in their upper arms and bodies, which raises their center of gravity and can make them less stable on their feet.

If excess muscle is too bulky it can interfere with the motion of a joint, which means that too much muscle strength can reduce a joint's range of motion and can actually reduce flexibility.

Each type of joint has a possible range of motion associated with it. This possible range of motion depends upon the type of joint it is, rather than the characteristics of the individual who possesses this joint. A joint's actual range of motion, however, is dependent upon the fitness levels of the individual. Since the possible range of motion is the theoretical maximal range of motion, the actual range of motion will always be less.

Balance is the ability to maintain equilibrium by neutralizing the forces that disturb it. Stability, meanwhile, is the ability to maintain balance while participating in actions that are likely to upset balance. Standing on one leg for several minutes demonstrates good balance, while playing in a vigorous soccer game without tripping or falling demonstrates good stability.