Within each joint there is an optimum ROM necessary for peak performance.
Inactivity -Causes joints to loose their flexibility because connective tissue shortens.
Gender - Women tend to be more flexible than men. Body Type and Strength Training - Flexibility is specific to each individual because everyone has a different muscle structure, joint structure and genetic composition. There are many different methods of stretching. Most experts recommend using the Static Stretching method. Once you're in the position, you should hold the stretch for 10 to 30 seconds without bouncing.