60 year-old tennis player/coach Rich Conti was amazed to see his forehand swing speed increase from 60 to 80 mph (http://www.swing-speed.com/tennis.php) after just 12 minutes on the Somax Power Hip Trainer.
Rich was shocked to find that he had almost no strength in his hip rotation muscles—which is actually common in tennis players as hip rotation is the only movement in tennis that has no natural resistance. This is where the Power Hip Trainer comes in. By providing resistance to hip rotation with its powerful steel spring, it can quickly increase your forehand speed by 20 mph.