While shooting a basketball, there are many joints involved. Some people have different shooting forms then others, and that means it is quite possible they avoid using certain joints to shoot. For example many NBA players don't jump to shoot free throws and have no knee movement what so ever. In this case however, Ray Allen is using majority of the joints in his body if not all, due to his very "unique" and "effective" 3 Point Shot which makes him one of the best 3 point shooters to ever live.
Major Joints Involved To start off, the first joint used by Ray Allen in his famous jump shot is the talocrural region or what is most commonly known as the ankle joint. It consists of three sub areas called the "subtalar joint", the inferior tibiofibular region and the talocrural regoin. Without the use of the ankle, Ray Allen would be incapable of lifting his body off the ground, which would make his shot much less effective, as he would not have the same momentum alongside the ideal distance between his hand releasing the ball, and the hoop. This is because the higher you are when you let go of the ball; the distance becomes shorter in between the ball and the hoop. Next off, Ray Allen incorporates the use of his knee's in the midst of his jump shot. The only reason this is a requirement in his form, is so that he has momentum right before he is jumping. If he decided not to use any assistance from his knee's and use strictly the ankle joint to jump, he wouldn't get as high and the distance between the ball and the hoop would increase making his shot less effective. Ray Allen also uses his acetabulofemoral joint, also known as the hip joint region in his shot. Reason for this is so that as he bends his knees, he maintains stable posture so that he is ready for a straight jump upwards to shoot the ball. If in any case, he decided not to use his hip joints in a jump shot, this would result to lack of balance as his knees' would be bending but