Okay guys I'm pretty damn sure that a TENS unit does nothing for muscle building but I've never really scientifically researched it the few things I've read on it some say yes some say no.
But being as it does cause pretty good muscle contraction would it be something 2 put on while I sleep and would it cost for muscle building average if someone is on cycle using a TENS unit or would be on cycle cost of tens unit to actually build muscle