A person who wants to concentrate on building muscular strength would lift heavy three to six days a week. Set lengths and repetition of sets would be short - three to eight reps times three or four sets. Bodybuilders, whose primary goal is building muscle mass, definition and tone, prefer a muscular endurance routine. Decide at the beginning of the workout what your desired intensity level will be, remembering to rotate at least one lighter intensity day each week. Incorporating muscle strengthening and endurance in your regular workout routine is important for many reasons.
Muscle is calorie-burning tissue.
A person who regular works out with even light weights and multiple reps will burn more calories than someone who concentrates solely on an aerobic routine. Unused or underused muscles provide little or no support for your skeleton, internal organs and skin. And working with weights consistently will give you visible, tangible results. A pound is a pound, but a pound of muscle burns about 50 calories a day. Whether your weekly routine incorporates more muscle strengthening exercises or more muscle endurance-building exercises, the choice is yours.