A meta-analysis was conducted to integrate the optimal exercise time and frequence for fat loss of overweight
elementary school students in Korea. From the accepted 15 studies, corrected effect size(ES’) were calculated
and used for comparison according to variables which have been suggested to have effects on fat loss
exercise program: exercise type, exercise frequency, exercise time, exercise interventions including the complex
intervention, % body fat, waist hip ratio, and body mass index. This results were as follows: first, the exercise
program applied to overweight an elementary school student are exercise type(aerobics exercise, anaerobics
exercise, combined exercise) impact on the waist hip ratio with aerobic exercise mean effect size '(MES') was
a 25.58, a combined exercise MES' was a 66.01. Second, the exercise program applied to overweight an
elementary school student are exercise frequently(1-2day, 3-4day, 5-6day/week) impact on the waist hip ratio
1-2day MES' was 75.00, 3-4day MES' was 66.01, 5-6day MES' was 0.87. Third, the exercise program applied to
overweight an elementary school student are exercise time(40 minutes or less, 40 minutes or more) impact on
the percentage of body fat, waist hip ratio each 40 minutes or less MES' was 33.18 and 66.01, 40 minutes or
more MES' was 31.18 and 25.58. Fourth, the exercise program applied to overweight elementary school
student are exercise interventions including the complex intervention(only exercise group, exercise and lifestyle
habits or parent education such as mediation) impact on the percentage of body fat only exercise group MES'
was 29.29, exercise and lifestyle habits or parent education such as mediation at the same time group MES'
was 35.67. Therefore optimal exercise interventions for fat loss in overweight elementary school students are
over 40 min/day in aerobic exercise.