Definitions by mrs. phelps<3
jo muscle
put your dominant arm out in front of you.
put your hand in a fist.
then move your wrist up and down.
you will see the muscle in your arm go up and down.
girls already have it but boys can develop a bigger jo muscle.
put your hand in a fist.
then move your wrist up and down.
you will see the muscle in your arm go up and down.
girls already have it but boys can develop a bigger jo muscle.
jo muscle by mrs. phelps<3 January 20, 2009
Mrs. Phelps
Mrs. Phelps by mrs. phelps<3 January 20, 2009