Recommendations: 2-3 Sets, 15-25 Reps
Sit on a chair and, holding the water bottle in your right hand as close as possible to one end, bracing your right forearm on the arm of the chair or edge of the seat. Lock your wrist so that the bar forms a 90 degree angle to your forearm. This is your starting position. Rotate your right forearm, lowering the free end of the bottle to the left as far as it will go. Then rotate the free end of the bottle to the right as far as it will go. Breathe normally. Repeat for the required number of repetitions. Sit on a chair and, holding the water bottle in your left hand as close as possible to one end, bracing your right forearm on the arm of the chair or edge of the seat. Lock your wrist so that the bar forms a 90 degree angle to your forearm. This is your starting position. Rotate your left forearm, lowering the free end of the bottle to the right as far as it will go. Then rotate the free end of the bottle to the left as far as it will go. Breathe normally. Repeat for the required number of repetitions.