Vol. 1, Issue 6, Part D (2015)

Abstract
Introduction: The measurement of reaction time has been used to evaluate the processing speed of Central Nervous System and the co-ordination between the sensory and motor systems. Reaction time is influenced by different factors. Human body responses to a number of external environmental stimuli of different modalities. Human body gives a desired & purposeful voluntary response to different types of stimuli. Reaction is a purposeful voluntary response to stimulus. There is certain time period between application of stimulus and appropriate motor response. Purpose: To compare a study on reaction time and heart rate responses in shuttle run between trained and untrained boys. Methods: Thirty boys (15 trained and 15 untrained boys), ages 15-18 years, volunteered to serve as subjects of the study. Reaction time, Heart rate, Shuttle was the selected variables of the study. Independent ‘t’ test and coefficient correlation was used to examine the significant difference, The level of confidence was set at .05. Findings: The t-value of Resting heart rate [2.68(<.05)], Post-bout heart rate [2.89(<.05)], Reaction time [2.66 (<.05)], and Shuttle run [7.50 (<.05)], between trained and untrained boys were found significant. No significant difference was found between the means of Pre-bout heart rate [1.48(> .05)], and coefficient correlation of Pre-bout heart rate [0.97 (< .05)], Post-bout heart rate [0.99 (<.05)], Reaction time [0.98 (<.05)], and Shuttle run [0.99 (<.05)], between trained and untrained boys were found significant. No significant difference was found between the means of resting heart rate [0.08 (> .05)], of two groups. Result: Mean value indicates that in resting heart rate, post-bout heart rate, reaction time, and shuttle run trained boys are better than untrained boys. However, in pre-bout heart rate no significant difference is observed between two groups under study.