The purpose of the study was to find out the effect of varied intensities, frequencies and densities of the hollow sprint of the performance of 100 meters sprints. To facilitate the study, eighty school boys of government higher secondary school, Salem district, were selected as subjects at random and they were divided into eight equal groups. The data were collected on 100mts running performance before training (pre test) as well as after the training (post test). The hollow sprints involve sprinting, jogging, sprinting, walking and repeating. This type of training provided adequate recovery, during the walking phase, mainly develops speed and muscular strength. In the high density of hollow sprints, the subject was performed 5 minutes rest between the sets. In low density of hollow sprints, the subjects performed 3 minutes rest between the sets .The pre test and post test were taken before starting the training programme and at the end of the sixth week respectively. In the pre and post test, random group research design was applied for analyzing the results. The finding of the study showed that there was significant improvement in speed, due to the influencing of varied intensities of hollow sprints.
