Comparison of landing impact during counter movement vertical jump among players from selected sports

Counter movement jump (CMJ) on is a standard vertical jump test usually done on force platform to measure ground reaction forces, which can be used to interpret number of important parameters related to fitness, performance and injury prevention. Maximum landing force can be normalized by body weight to obtain landing impact which is a direct indicator of fitness and to find out injury probable. The purpose of this study was to compare the landing impact during CMJ among players from Hockey, Fencing, Boxing and Wushu. The study was conducted on 231 players from all the mentioned disciplines. All the participants were part of Sports Training Centre at Netaji Subhas National Institute of sports (NSNIS), Patiala. Each player performed counter movement vertical jump (without arm swing) on force platform. Result of the study indicate that hockey players recorded minimum ground reaction force while landing and Boxers show the maximum. Landing impact basically shows the eccentric strength of the lower limb an individual possesses, which is a trainable parameter.