Body Responses to Combination of Endurance and Strength Training for Kids Aged 13-14 Years Old

Abstract

Young boys experience increased hormonal changes at about thirteen to fourteen years of age that is why they grow fast. This study observes body responses to a combination of endurance and strength training among children at age of thirteen to fourteen years old. As a preexperimental study, it applied a One Group Pretest-Posttest Design. Samples of this research were fifteen male volleyball athletes aged thirteen to fourteen years old. For data collection purpose, tests and assessments were carried out. The test instrument concerned the "back and led dynamometer" for the assessment of limb and back muscle strength, "pool and push dynamometer" for the assessment of shoulder muscle strength, and "multistage fitness test" for the assessment of aerobic fitness. During sixteen meetings, treatments were given using Interval training process for a combination of endurance and strength training. The training involved an addition of a fivekilogram iron equipment and was conducted in sand volleyball court at 60% to 70% of maximum heart rate. To analyze the data, this research adopted a t-test analysis after a set of assumption test. The results show the major influence of a combination of endurance and strength training on increased motor ability along with aerobic fitness with 3.60 of t-test value, 0.003<0.05 of significance level, and an increase of 9.62%. though, a significance level > 0,005 indicates no significant influence on biomotor strength. Keywords-body responses, combination of endurance and strength training, kids aged 13-14 years old.