Which of the following is an example of “proximal stability creates distal mobility?”/2022

Which of the following is an example of “proximal stability creates distal mobility?”

1. DECREASED HAMSTRING MOBILITY AFTER PERFORMING A PLANK
2. INCREASED HAMSTRING MOBILITY AFTER STRETCHING THE CALVES
3. INCREASED SHOULDER MOBILITY AFTER STRETCHING THE PECTORALS
4. INCREASED HAMSTRING MOBILITY AFTER PERFORMING A PLANK