I purchased the green Flexbar to use for tennis elbow pain. Lots of moves that previously surprised me with wrenching pain seem to have diminished. I don't do the Flexbar exercise on a regular basis, just about ten times every couple of days. I'm about 6 foot 180 pounds, and strong enough to do pull ups and push ups easily. I have not tried the red Flexbar, but at this point I'm sure it wouldn't be enough resistence for me. Likewise, I don't think the blue would be overkill, and will probably purchase the blue Flexbar soon. Overall, it's a great portable and convenient tool for working on the connectors around the elbow, and for me at least, it makes living with tennis elbow tolerable.
Rating: [4 of 5 Stars!]