Jumping is used in many sports for different purposes. In each
sport, the jump is performed in a way that enhances the purpose
of the jump, such as: - High jumpers perform a backward roll
over the bar, to gain the greatest height (which works because
they have a cushioned landing area). - Long jumpers extend their
arms legs in front of their body, to reach out and gain the
greatest distance (which works because they have a cushioned
landing area). - Hurdlers use an extended scissor action of the
legs to clear the hurdle, gain height, and set themselves up for
the next hurdle (which works because they know what is on the
other side of each hurdle). No matter the sport, the primary
purpose of a jump is to raise the body to higher altitude
(except with jump off or into something, such as jumping off a
diving board or parachuting from an aircraft, where the purpose
is to lose altitude). A secondary purpose may be to move the
body quickly over a distance, such as jumping out the way of a
foil in fencing. Martial a