how many days a week should you workoutwhat happens if you workout everydayhow often should you workouthow often to train muscle groups per weekworkout out everydaytrain everydayrest daysovertrainingbest training frequencyhow often to trainhow often to lift weightscan i work out everydayhow many rest days a weekbuiltwithsciencejeremyethierbest workout splitbest workout routineworkout split to. build muscleworkout routine to build muscle