How to get one jump ahead

Humans and fleas have a common ability: they can jump from a standing start by stretching a pair of legs. However, when it comes to jumping performance, humans are puny. Bush-babies – particularly charming small relatives of monkeys – can leap to heights of over 1.5 m, about eight times their body length; locusts, with bodies about 50 mm long, can leap to heights of more than 700 mm. Fleas are even more spectacular, attaining about 100 body lengths. These differences are partly a result of their various jumping techniques, but does each animal necessarily use the best method for its size and body design? If humans jumped like fleas, would they jump any higher?