The aim of the study was to quantify the Flexibility of college-age female athletes in response to high-intensity interval training and moderate-intensity continuous training. To this study forty five (N=45) female athletes from various Arts and Science Colleges in Coimbatore District, Tamilnadu, India, were randomly chosen as subjects. They were divided randomly into three groups of fifteen each i.e., (n=15) Group-I underwent High-Intensity Interval training (HIIT), Group-II underwent Moderate-Intensity Continuous Training (MICT) and Group-III acted as Control. The training period was limited to three days per week for twelve weeks. The Sit and reach test was used to measure the dependent variable for this study, which was Flexibility. The chosen dependent variable was assessed on each individual both before and right after the experimental period. With the dependent 't'-test and Analysis of covariance, the data collected from the experimental groups and control group prior to and following the experimental period were statistically evaluated (ANCOVA). The Scheffe's Post hoc test was used to ascertain the paired mean differences whenever the 'F' ratio for adjusted post test means was found to be significant. For each scenario, the degree of confidence was set at 0.05. The development of balance ability was found to be improved by the High-Intensity Interval Training group (HIIT) more than the Moderate-Intensity Continuous Training group (MICT) and Control group.

Key words: High-Intensity Interval Training, Moderate-Intensity Continuous Training, Flexibility