But there is no conclusive evidence that hormonal differences equate to strength differences. For example, some researchers believe that studying testosterone levels in women may help predict when that woman's optimum strength and power training times may be. Weightlifting and bodybuilding are two activities defined by the desire to create muscular strength and muscular endurance respectively. However, the routines will be different because the goals are not the same. Muscular strength is defined as the ability to lift a heavy object at least once.
Muscular endurance is the ability to lift a lighter object multiple times.
Weightlifters strive for single rep maximums - the greatest weight they can lift in good form at least one time. Their primary goals are to build strength and power. 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.