Results (cont’d).

Abstract Methods (cont’d)

Purpose

Conclusions

Authors here: Allison Jack

Biomechanics Research Laboratory, The University of Texas at Arlington, Arlington, TX; Dr. J. Wilson, Dr. M. Ricard; KINE 4400 Fall 2013

The Comparison of Vertical Jump Height Between Gender and Body Fat Percentage

The purpose of this research study was to determine if gender or body fat percentage has a greater impact on vertical jump height.

PROCEDURE:• Demographic variables were collected for age, height, and weight

after each subject signed a consent form• Skinfold measurements were taken on each subject• 1 Repetition Maximum (1RM) Leg Extension was measured on each

subject• Each subject was instructed to stand on the force plate for their body

mass to be measured• Each subject was then instructed to complete the first vertical jump

with their hands on their hips• Each subject was instructed to complete the second vertical jump

with their natural arm movements during a vertical jump

Variable Mean ± SD

Age (years) 21.43 1.62

Height (inches)

63.29 1.25

Weight (lbs) 119.86 5.79

BMI (kg/m2) 21.73 1.67

Female Demographic VariablesMale Demographic Variables

Variable Mean ± SD

Age (years) 20.57 1.51

Height (inches)

71.29 2.63

Weight (lbs) 172.14 15.39

BMI (kg/m2) 23.81 1.58

Male Reference Variables Female Reference Variables

Male Performance Variables

Variable Mean ± SD

Jump Height (cm)

39.32 7.29

Jump Velocity

(m/s)2.77 0.25

Jump Force (N)

1717.35 174.9

Average Power (W)

2415.5 339.39

Female Performance Variables

Variable Mean ± SD

Jump Height (cm)

21.75 4.69

Jump Velocity (m/s)

2.05 0.23

Jump Force (N)

1075.29 214.94

Average Power (W)

1071.78 163.87

Variable Mean ± SD

Body Fat (%) 15.11 2.73

1RM Leg Extension

(lb.)250.00 0.00

Variable Mean ± SD

Body Fat (%) 21.63 1.95

1RM Leg Extension

(lb.)132.86 20.18

Results

T-Test Male Female

Body Fat % & Jump Height 1

p=3.38e-4 p=0.37

Body Fat % & Jump Height 2

p=2.76e-4 p=0.19

Strength & Jump

Height 1p=3.29e-11 p=8.98e-6

Strength & Jump

Height 2p=4.52e-10 p=6.48e-6

T-Test Male Female

Power 1 & Jump

Height 1p=2.30e-6 p=8.67e-7

Power 2 & Jump

Height 2p=1.30e-6 p=6.70e-6

Force 1 & Jump

Height 1p=3.12e-7 p=9.11e-7

Force 2 & Jump

Height 2p=7.68e-8 p=4.99e-5

INTRODUCTION: Vertical jump height is seen as a muscle performance test that indicates power and force production. It is a kinematic measure used to determine the differences between males and females based on their frontal plane hip angle. Along with different hip angles, males also have greater leg girths than females that could be an anthropometric measurement that influences power production. Males generally have a greater vertical jump height than females with arm swing because of their upper body strength, which influences power production. This is an important factor when determining training program and types of exercises because males and females respond to types of jumps differently. PURPOSE: The purpose of this research study is to determine if gender or body fat percentage has a greater impact on vertical jump height. METHODS: Seven men (M: age 20.57 ± 1.51 yrs) and seven women (F: age 21.43 ± 1.62 yrs) with no previous training in vertical jump volunteered to participate in this study. Each subject had demographic variables, skinfolds, and one repetition maximum leg extension measured before the test started. Then each subject was instructed to jump once with their hands on their hips on the force plate in the Biomechanics Laboratory and once with their natural arm movement. RESULTS: The results revealed that males naturally have a lower body fat percentage (M: 15.11 ± 2.73% versus F: 21.63 ± 1.95%), and greater vertical jump height (M: 39.32± 7.29 cm versus F: 21.75 ± 4.69cm), force (M: 1717.35 ±1 74.9 N versus F: 1075.29 ± 214.94 N), and power production (M: 24.5.5 ± 339.39W versus F: 1071 ± 163.37 W). This difference in variables showed a significant difference, p<0.05. CONCLUSION: The main results showed that males have a higher vertical jump than females due to variables, such as lower body fat percentage, greater leg strength, and greater force and power production. The results showed no real significance for females between body fat percentage and jump height (p>0.05), but significance was seen in males. Analysis of the results revealed that males naturally have a higher vertical jump, leg strength, and force and power production than females.

• The main results show that males have a higher vertical jump than females due to variables, such as lower body fat percentage, greater leg strength, and greater force and power production

• The results showed no real significance for females between body fat percentage and jump height (p>0.05), but significance was seen in males

• Analyzing the results reveals that males naturally have a higher vertical jump, leg strength, and force and power production than females

SUBJECTS:• Sample consisted of 7 college-aged men and 7 college -aged women

with no previous training in vertical jump for a total of 14 subjects• Subjects participated on a voluntary basis.

INSTRUMENTATION:• Body Fat Percentage was measured by a skinfold caliper (accuracy

±0.5mm, Lange)• Jump variables were measured by force plate in the Biomechanics

Laboratory• 1RM Leg Extension was measured by a Precor leg extension

machine in the Biomechanics Laboratory

Methods