Recommendations: 2-3 Sets, 15-25 Reps
Stand upright with your knees slightly bent and hold water bottles in each hand as close as possible to one end. Bend your elbows 90 degrees and brace them against your sides. This is your starting position. Rotate your forearms, lowering the free end of the bottles to the left for the right bottle and to the right for the left bottle as far as they will go. Breathe normally. Rotate the free end of the bottle to the opposite side as far as they will go. Breathe normally. Repeat for the required number of repetitions.