Abstract:
The study was conducted to investigate the Effect of 12 Weeks Aerobic Exercise on Muscular
strength, Muscular Endurance and Flexibility of Male Students of Harar Junior Secondary
School, Harar city, Harari Regional State. In this school there were students as the study
population From 398 male students only forty male students were selected as study subjects by
using simple random sampling techniques. All Selected subjects were participated in low,
xix
moderate and high intensity in selected aerobics exercise for 12 consecutive weeks that is 4 days
per week 60 minute duration per day. Pre, during and post training tests were conducted on the
selected physical fitness variables such as muscular endurance, muscular strength, and
flexibility. The data collected from the study subject were analyzed using SPSS version 20
software. The data pertaining to those selected physical fitness variables were analyzed by
paired sample ‘t’ test to determine the significant difference between initial and final mean for
participant. According to analyzed data in push up 8.37 mean differences was recorded. The
mean difference value boosted in sit up performance by 4.70 after putting the subjects for 12
weeks on selected physical exercises. In sit and reach test 4.17 increments were observed. The
result obtained in this study indicated that there were significant improvements in muscular
endurance, muscular strength and flexibility. Based on this finding, it can be concluded that low,
moderate and high intensity aerobics exercise has positive effect on enhancement of muscular
endurance, strength and flexibility of students of Harar Junior Secondary School.
