This exercise is great for strengthening the wrist extensors (implicated in tennis elbow) and shoulder rotator cuff/anterior deltiod. Try to do 3 sets of 10-12 every second day. You should feel it working your forearm muscles and the muscles at the front of your shoulder.
Andrew Clark is a father of 3 and the owner and principal physiotherapist at Clinical Physiotherapy, St Ives. He graduated with a Masters degree from the University of Sydney in 2010 and has since had 10 years experience working in musculoskeletal private practice. He has undergone extensive professional development and has experience treating a wide variety of patients and musculoskeletal conditions.