Rotator Cuff - Internal Rotation Primary muscle(s) and equipment Rotator Cuff, Shoulder, Shoulders, Isolation, Dumbbell, Bench, Rehab How to do the Rotator Cuff - Internal Rotation Lie on your right side. Keep your left arm along the upper side of your body. Bend your right elbow to 90°. Keep the right forearm resting on the table. Now roll your right shoulder in, raising your right forearm up to your chest. (Hint: This is like the forehand swing in tennis.) Lower the forearm slowly. Repeat the exercise until your arm is tired. Then do the whole exercise again with your left arm.

Averages for MyFit Users

The table below represents data from over 200,000 exercise logs and gives us an average for this exercise.

Average Weight Lifted	Average Reps	One Rep Max Average
26.4 lbs	12.6	40.2 lbs

 

How do I figure out a good starting weight?

Based on an average weight lifted of 26.4 lbs for all MyFit users we suggest you start at 50% of that weight:

Try 13 lbs and aim for 12-15 reps.