I am a physician who has had revision hip surgery and am on strict range of motion and weight bearing limitations. I was looking for a unit that would be capable of performing evidence based stimulation (J Cachexia Sarcopenia Muscle. 2018 Aug; 9(4): 631–634.) for muscle growth and prevention of atrophy.
There are a few units that meet this criteria, BUT they either are very expensive OR they only have 2 wire outputs. This unit allows for 4 wire connections, meaning 8 skin contact electrodes, so more large muscle groups can be stimulated at once. Works great, and GETS THE JOB DONE MUCH BETTER THAN A 2 CHANNEL UNIT.
A few tips:
1. The stimulation level can go much higher if the unit is plugged in (important for large muscle groups)
2. To get the right stimulation level for "synchronous" (on/off) can be a bit frustrating. Start with the unit on continuous and increase 1 channel until the muscle is in full contraction. Back if off slightly then go to the next channel. Do this until they are all just below the max you want then switch to the program S. Bring them up again 1 by 1. After doing this once or twice, you'll know where each muscle group is going to be and don't be surprised that there's a big difference in different muscle groups. Thickness of skin/fat/etc can greatly affect the amount of stimulation getting to the muscle.
3. For my purposes, the 2nd edition of this unit would have been just as good but $30 less. It looks exactly the same but no Russion…