The reactive strength index measurement of an athlete's explosiveness by comparing their jump height to the ground contact time in between their jumps. On a scale of 0-5.
Vertical Jump
A measure of any athlete's body strength and reach calculated from the flight time divided by the contact time.
Reed Jonkman: C/3B, (2025) Kalamazoo Christian Highschool, MI. 6-foot-1, 175-pound. (64.5 mph bat speed average). (20.5 mph hand speed average). Began in a balanced stance with a compact load, then used a small stride. Found some barrels with some loud contact. While catching, he produced a position velocity of 72 mph during throw downs; had in control aggressive footwork, sure hands, and a quick transfer. Staggered wide setup with average flexibility.
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Reed Jonkman: C/3B, (2025) Kalamazoo Christian Highschool, MI. 6-foot-1, 175-pound. (64.5 mph bat speed average). (20.5 mph hand speed average). Began in a balanced stance with a compact load, then used a small stride. Found some barrels with some loud contact. While catching, he produced a position velocity of 72 mph during throw downs; had in control aggressive footwork, sure hands, and a quick transfer. Staggered wide setup with average flexibility.