Have been a golf pro for 43 years and a teaching pro exclusively for the last 20 of those years.Most of the research indicates that training aides aren’t really that effective. That being said I have use a couple that seem to work …
1. Medicine ball -4-6 lbs works, helps players (especially new players) feel the motion of the swing.
2. The Golf Swing Shirt-Best pure training aide helps players engage big muscles and also helps posture and set up. Can be used for full swings, pitching and putting.