Hypertrophy

Muscles involved in regular resistance exercise can also become larger. This increase in muscle size is called hypertrophy. Together, these changes can alter someone's shape without necessarily reducing their overall body mass.

Muscular hypertrophy means that muscles increase in size. Resistance exercise, such as weightlifting, can produce hypertrophy and increase muscular strength. A stronger muscle can exert more force: for example, a rugby player may be better able to drive against an opponent in a scrum.