Originally Posted by LuckyR
I'll buy rehab for a Pro (or anyone else for that matter), but active training and conditioning for a Pro? I don't think so. (I don't mean there aren't Pros who use them, but I seriously doubt there is a Pro who has musculature so feeble that a single surgical tubing is going to provide enough resistance to do much of anything beneficial).
They aren't for his muscles necessarily. There mainly used for tendons and joints and things.(when not used for rehab) I bet Nadal was 100% healthy in the pic. You have to be very careful not to lift too much weight when doing those types of motions.