Project Title

Impact Kinetics of Depth Jumps with Varying Heights and the Relationships to Body Composition of Individuals

Major

Exercise and Wellness

Department

Exercise and Sport Science

Degree

Graduate

Mentor

Michael T. Lane

Mentor Department

Exercise and Sport Science

Abstract

Purpose; to determine peak force, rate of force development, ground contact time, and peak force upon landing during a depth jump (DJ). Additionally measuring the relationship between the jump and the subjects’ bodyweight, and how landing surface hardness effects landing forces. Methods; Five recreationally trained college aged students (BM; 72.3±15.1kg, Height; 177.4±9.6cm) volunteered for this study. Each subject began on a box beginning at a height of 15 centimeters, then moving up to 30, 45, and 60 centimeters. They performed two DJ from each box, upon landing they were instructed to perform a maximal effort vertical jump onto a second 60 centimeter box with either a hard top or a soft top. During testing subjects began by landing on one force plate, upon takeoff they landed onto the following box that was placed on a second force plate directly in front of the first. The dependent variables were normalized to body weight. The following criteria were measured for each jump attempt; initial contact upon dropping off the first box, peak force, rate of force development, ground contact time, initial contact when landing on the second box, peak force, and rate of force development. Results; statistical analysis utilizing ANOVA with LSD post hoc testing showed a significantly greater amount of force production, p

Presentation format

Poster

Poster Number

004

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Impact Kinetics of Depth Jumps with Varying Heights and the Relationships to Body Composition of Individuals

Purpose; to determine peak force, rate of force development, ground contact time, and peak force upon landing during a depth jump (DJ). Additionally measuring the relationship between the jump and the subjects’ bodyweight, and how landing surface hardness effects landing forces. Methods; Five recreationally trained college aged students (BM; 72.3±15.1kg, Height; 177.4±9.6cm) volunteered for this study. Each subject began on a box beginning at a height of 15 centimeters, then moving up to 30, 45, and 60 centimeters. They performed two DJ from each box, upon landing they were instructed to perform a maximal effort vertical jump onto a second 60 centimeter box with either a hard top or a soft top. During testing subjects began by landing on one force plate, upon takeoff they landed onto the following box that was placed on a second force plate directly in front of the first. The dependent variables were normalized to body weight. The following criteria were measured for each jump attempt; initial contact upon dropping off the first box, peak force, rate of force development, ground contact time, initial contact when landing on the second box, peak force, and rate of force development. Results; statistical analysis utilizing ANOVA with LSD post hoc testing showed a significantly greater amount of force production, p