EMS is a full body workout that targets your whole body rather than one specific body area. EMS stimulates up to 98% of all muscles whereas a traditional workout may only use 50% of the actual muscle or muscles targeted. This means your workout can be a lot shorter, a 20 minute workout could be the equivalent of a several normal 90 minute sessions per week, as much as between 4 to 6 hours to target actual muscle groups similar to one Body Express session.