Final answer:
A depth jump measures explosive strength, which is the ability to exert maximal force in a short period of time as required in jumping or sprinting.
Step-by-step explanation:
A depth jump is used to measure explosive strength. This type of strength is required for activities that involve a high-intensity, short duration burst of power, such as jumping, sprinting, or lifting heavy weights. During a depth jump, an individual drops from a height and immediately jumps vertically as high as possible upon landing. This movement requires the muscles to exert a maximal force in a very short period of time, which is a characteristic of explosive strength.
Explosive strength is the ability of a muscle or group of muscles to generate maximum force in a short period of time. When performing a depth jump, an individual jumps off a raised platform and immediately jumps again as soon as they touch the ground. This exercise requires a high amount of explosive strength to generate power for the second jump.