Open AccessAnalysis of muscle activity and kinematic variables according to jump type of 3m springboard diving 109C skill : case study
Author(s) -
Tae-whan Kim,
Sung-Min Kim,
Sang-Hyup Choi
Publication year - 2019
Publication title -
cheyuk gwahag yeon-gu/cheyug gwahag yeon'gu
Language(s) - English
Resource type - Journals
eISSN - 2233-7938
pISSN - 1598-2920
DOI - 10.24985/kjss.2019.30.4.907
Subject(s) - jump , kinematics , joint (building) , physical medicine and rehabilitation , displacement (psychology) , psychology , physical therapy , mathematics , orthodontics , simulation , medicine , computer science , engineering , structural engineering , physics , classical mechanics , quantum mechanics , psychotherapist
Purpose The purpose of this study is to overcome the shortcomings of 109C(Forward 4 ½ somersault) skill(Level 3.7) for two members of the men’s national diving team(YHR, KYN). Methods For qualitative analysis of the performed skill, three high-speed cameras and water-attached EMGs consisting of a total of ten placements were used. We instructed the two players to perform single-leg jump and double-leg jumps a total of three times each. Results The results of this study indicate that YHR and KYN appeared to increase their time or maintain the same time compared to the previous phase and displacement appeared higher when skill success occurred after the double-leg jump. The Shoulder & hip joints of YHR, KYN appeared larger in E2 and the hip joint of KYN appeared to increase in E1. Single-leg jump appeared similar or decreased the performed time of the previous phase in the last P5. YHR appeared larger only at a hip joint angle and KYN appeared smaller at the hip joint. The muscle activity(iEMG) of the two players appeared greater during skill failure than most of the muscles. Conclusions When perfectly performing 109C skills, the acquisition of medals in international competitions is possible. Therefore, in the future, it is necessary to study all of the variables that pertain to 109C.