Fill out the chart with this information:
List the joints actions and types of muscle actions in the upper extremity during the (a) upward phase and (b) downward phase of a classic pull-up.
Note: if there is no motion, please indicate that the joint is fixed in some position: Example, fixed in extension. Then indicate what muscles are working to keep it fixed and how they are being activated.
*Hint: if it is fixed, is there any change in length?