Kinetics and kinematic analysis of different phases in 100m sprints

Purpose: This paper reports on the effect of the leg strength, pre-running pulse rate and other kinematic characteristics, such as velocity and acceleration, on sprinters' ability to complete a 100-meter sprint.Methodology: The study subjects are eight Rajshahi University sprinters (5 males and 3 females) chosen through the inter-university athletics championship-2022. Their ages ranged from 21 to 24 years. In the present study, a 100-meter running distance was divided into ten equal distance zones, with two manual stopwatch timers stationed at the end of each 10-meter segment. Time data was calculated using the two timekeepers' averages for each zone. Two 100m trials were conducted after an hour's rest from the initial trial, and the fastest time was used as the final data. Leg strength and pre-run heart rate were measured using the Japanese leg strength machine ZARITZ BM-220 and an oximeter. Results: The present study observed that the sprinter (both male and female) having normal pre-run pulse rate, superior leg strength, better reaction time ability, longer speed endurance, but lower deceleration rate takes least time to cover the 100m sprint. In contrast, the sprinter taking longer time has poor leg strength, weak reaction time ability, shorten speed maintenance, and higher deceleration rate. The present study concludes that sports performance anxiety can increase heart rate prior to a sprint, thereby reducing performance, whereas peak limb strength indicates peak performance.