STRENGTH TRAINING MACHINE DRILL, MODIFIED EXERCISE 2D: SINGLE-LEG CURL (PRONE)
This exercise (Figure 6-27) is performed using only one leg at a time. Soldiers with low back or hip injuries may prefer to use the seated leg curl if it is available. The range of motion and resistance is decreased for the injured leg. As the Soldier’s condition improves, the range of motion may gradually increase until the exercise is performed to standard (heel to the buttocks). The resistance should not be increased until the Soldier can move through the full range of motion. The single-leg curl is used to maintain a heavy resistance on the good leg and to reduce the resistance on the injured leg.

Figure 6-27. Single-leg curl (prone)