Determination of Repetitive Jumping Intensity Relative to Measured VO_2max

<p>To regular exercise and a healthy diet, the American Heart Association (AHA) strongly recommends rope jumping, and according to previous studies, rope jumping is considered a very strenuous exercise. Therefore the purpose of this study was to determine the steady state metabolic cost of repetitive jumping on the Digi-Jump machine, and to determine if exercise on this device is more or less strenuous than similar exercise with a jump rope. We also evaluated relative intensity of this type of exercise, based on each person’s VO_2max as measured on a treadmill. Twenty – seven subjects completed two trials, one jumping trial at a rate of 120 jumps per minute (JPM) with the jumping height set at .5 inch for 5 min, and one graded exercise test (GXT) using the Bruce protocol. Oxygen uptake (VO₂), heart rate (HR), respiratory exchange ratio (RER), and rating perceived exertion (RPE) were measured each minute during each trial. Results of this study indicated that steady state VO₂ during the 5 min jump test was reached at the 3rd min (p < .05), therefore we equated all other variables (HR, RE, RPE) steady state to be from 3rd min. Average jumping steady state VO₂ was 31.1 ± 5.5 ml/kg/min, while average VO_2max was 56.4 ± 12 ml/kg/min, thus steady state VO₂ during jumping trial was 57.1% of VO_2max. Average jumping steady state HR was 149. 2 ± 20.1 bpm, while mean GXT HR was 184.7 ± 9.9 bpm, thus steady state HR during jumping trial was 80.9% of their maximal HR obtained during GXT. Average jumping steady state RER was .99 ± .6,while average GXT RER was 1.15 ± .07, thus steady state RER during jumping trial was 86%, and average jumping steady state RPE was 13.5 ± 1.5, while average GXT RPE was 17.9 ± 1, thus steady state RPE during jumping trial was 75.2%. These data indicate that jumping is a strenuous activity, even if the trial is done on Digi – Jump machine without rope.</p>

Name thesis:degree_name

Master of Science

Discipline thesis:degree_discipline

Department of Kinesiology, Recreation and Sport

Year

2012

Author dc:creator

• Igaune, Laura

Contributors dc:contributor

• Dr. Scott Lyons (Director), Dr. Mark Schafer, Dr. Scott Arnett, Dr. Gina Evans

• cardiovascular exercise
• metabolism
• exercise science
• Kinesiology
• Psychology of Movement
• Sports Studies

Repository record dc:identifier

https://digitalcommons.wku.edu/theses/1208

OAI identifier oai:identifier

oai:digitalcommons.wku.edu:theses-2211