Most people probably haven't ever heard of eccentric exercise, which is the type of exercise these bars provide. Eccentric, or "negatives" as bodybuilders call them, are basically the lowering portion of an exercise. For instance, if you lift a weight over your head and lower it, the lifting is the "concentric" part, and the lowering of the weight is the "eccentric" part.Without a doubt, this is one interesting tool you can use that will provide eccentric exercise for your wrist muscles. So what's the big deal with eccentrics? Well, there have been studies showing that when people with tendonitis conditions do just the eccentric part of an exercise, they get better. Problem is, there are tennis elbow studies specifically showing that if you do just the concentric (or lifting part) only, you get better too (Martinez-Silvestrini 2005). Therefore, eccentric exercise, as this tool most surely provides, will help tendonitis, but its far from a "magic" cure, and you can achieve the same results as doing "concentrics" with a light dumbbell.Perhaps more importantly though, people with tennis elbow need to know that resistance exercise is just ONE part of what you need to be doing to totally get rid of your tennis elbow.Studies on tennis elbow and eccentric exercise, such as the one I quoted above, had patients ALSO do stretching exercises and I know of no studies that have had people with tennis elbow do just eccentric exercise alone and they've gotten better. Therefore, suggest people with tennis elbow check out this tool, as well as books like Treat Your Own Tennis Elbow for a well-rounded program. Good luck.
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[5 of 5 Stars!]