Economy - Etymology. 1  The English words economy and economics can be traced back to the Greek word Î¿á¼°ÎºÎ¿Î½ÏÎ¼Î¿Ï (i.e. household management), a composite word derived from Î¿á¼¶ÎºÎ¿Ï (house;household;home) and Î½Î­Î¼Ï (manage; distribute;to deal out;dispense) by way of Î¿á¼°ÎºÎ¿Î½Î¿Î¼Î¯Î± (household management).
Today many people confuse TENS with electrical muscle stimulation (EMS). EMS and TENS devices look similar, with both using long electric lead wires and electrodes. TENS is for blocking pain, where EMS is for stimulating muscles.
EMPI TENS Unit Review. EMPI offers top of the range electrotherapy devices that are used the world over. They combine this with a wide range of accessories that are required for their Transcutaneous Electrical Nerve Stimulation (TENS) devices and their Neuromuscular Electrical Stimulation (NMES) devices.