Muscular Fitness
	For a muscle to increase in strength and endurance, the workload to which it is subjected during exercise must be increased beyond what it normally experiences.
	Muscular fitness has two components:
		Muscular Strength
		the greatest amount of force a muscle or muscle group can exert in a single effort.
		Muscular Endurance
		the ability of a muscle or muscle group to do repeated contractions against a less-than-maximum resistance for a given time.
	The weight being lifted the number of repetitions creates the desired effects or muscular strength and endurance.
		6 or fewer repetitions will produce muscular strength.
		8-12 repetitions will result in a combination of muscular
		strength and endurance.
		13 or more repetitions will produce muscular
		endurance.