Does anyone have any experience of using those electro pules bits of kit that say they tone/massage/build muscle to actually build muscle? Here's the story - Bloke has a gamy leg, quite bad knee pain from time to time with arthritus, goes to gym regularly uses bike, treadmill (fast walking, hill climb) and cross trainer. He wants to target train his left leg to build it up as its an inch smaller in circumferance than his right. The gym staff (civie gym) have given him a weights programme, which he will use in addition to his normal phys routine. One of them suggested he look into an electro pules gysmo so he can plug himself in for a couple of hours a day to blitz his quads in addition to the 'real' training. Anyone have any experience of these types of kit for specifically building up muscle strength and mass (as opposed to other recreational use... )?