|
KMID : 0613820090190040492
|
|
Journal of Life Science
2009 Volume.19 No. 4 p.492 ~ p.501
|
|
|
Effects of Weight Training by Intensity for 8 Weeks of Metabolic Syndrome Factor Improvement in Overweight High School Students
|
|
Jeong Seon-Tae
Kwon Sun-Ok
|
|
|
Abstract
|
|
|
|
The purpose of this study was to examine the most effective weight training (WT) intensity for the improvement of metabolic syndrome factors in overweight high school students. Sixty overweight high school students were randomly divided into 4 groups (15 subjects/group) according to WT intensity: A group - control group, B group - 40-55% repetition maximum (RM) group, C group - 60-75% RM group, and D group - 80-90% RM group. They exercised between 60-70 minutes a day, three times a week, for eight weeks. In order to determine the most effective WT intensity, five metabolic syndrome factors--waist size, fasting glucose, triglyceride (TG), high-density lipoprotein-cholesterol (HDL-C) and blood pressure--were measured for each subject prior to and after the experiment. Waist size decreased in all exercise groups, but the results were more prominent in the 40-55% RM and 60-75% RM groups. TG levels also decreased in all groups but results were more prominent in the 40-55% RM group. HDL-C levels in the 80-90% RM group were significantly higher than the control group. Groups did not show any significant difference in the diastolic blood pressure, but the 40-55% RM group’s systolic blood pressure significantly decreased compared to other groups. Groups did not show significant difference in the fasting glucose level. These results indicate that lower-intensity weight training is generally more effective than the higher-intensity weight training in improving metabolic syndrome factors in overweight high school students and that the most effective WT intensity is 40-55% RM.
|
|
|
KEYWORD
|
|
|
Weight training intensity, metabolic syndrome factors, repetition maximum, triglyceride, high-density lipoprotein-cholesterol
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|