Study reveals why chimpanzees are stronger than humans

A US-based study reveals chimpanzee muscles' maximum power output is about 1.35 times higher than a human muscle of similar size, which is "modest" compared with historical accounts of its "super strength". Researchers found chimps have in general longer muscles and twice as many fast-twitch muscle fibres relating to power as humans, who have more slow-twitch fibres relating to endurance.