Pronation: the natural side-to-side movement
He can progress by Jump-roping, running(same as Jogging almost), swimming and bicycling, Aerobic's and Aerobic Dance, and At-Home exercises.
ATP-driven pumps will move Ca ++<span> out of the sarcoplasm back into the SR. This results in the “reshielding” of the </span>actin<span>-binding sites on the thin filaments. Without the ability to form cross-bridges between the thin and thick filaments, the </span>muscle<span>fiber loses its tension and relaxes.</span>
These are all true but I do not know the last part of the answer
