The Comparison of Effect of Dose Response Relate to Number of Training Sessions of Physical Fitness in Sedentary Adolescence Boys

In recent years, the interaction effects between duration and number of session per week was attractive for health investigators. According to this idea, The purpose of present study a randomized trail to compare the effects of dose response on fitness variable on sedentary adolescence boys. 48 students volunteers with sedentary boys were randomized to four groups with mean SD of age included: two session group (2S): N=12, 13.3 2.3 years, three sessions group(3S): N=12, 13.5 2.7years, four session group(4S): N=12, 13.7 3.1 years, control group(CG): N=12, 13.3 3.4 years. 2S training program included running with 60 -70 HRmax, 25-35 min, 2 day/wk and 3S training group preformed 17-25 min running with same intensity, 4S training group preformed 12-15 min running with same intensity day/ w for 12 weeks. Physical fitness variables which preformed in Training programs include muscular endurance, flexibility and agility. Data analysis by one ways of ANOVA and Benfroni post hoc test showed that: hand power, speed, cardio respiratory, flexibility variables had improved significantly P<0.05 at three experimental group. But in balance, coordination, power, agility, muscle endurance had improved significantly P<0.05 at three and four session group rather than control group. In whole, performing two training programs had useful adaptation and changing the number of sessions has affected on only improvement rate, but in case of agility, the effect of changing the number of session was more than whole training duration per week. In whole, performing three training programs had useful adaptation and changing the number of sessions has affected on only improvement rate, but in some cases such as balance, coordination, power, agility had needed to exercise with session more, and increase of training sessions do n`t have effective on flexibility.