What do you mean by long jump?​

jump far into sand pit measure distance from closest point of contact

Explanation:

an athletic event in which competitors jump as far as possible along the ground in one leap.

"a long jump champion"

or

The long jump is a track and field event in which athletes combine speed, strength and agility in an attempt to leap as far as possible from a take off point. Along with the triple jump, the two events that measure jumping for distance as a group are referred to as the "horizontal jumps". This event has a history in the Ancient Olympic Games and has been a modern Olympic event for men since the first Olympics in 1896 and for women since 1948

I hope it's helpful!