코어 훈련과 플라이오메트릭 훈련이 사이드 커팅 시 하지 운동학적 변인과 근활성도 및 운동수행능력에 미치는 효과

Abstract

The purpose of this study is to compared the effects of 8-weeks of core training and plyometric training on lower extremity kinematic variablesand muscle activity during side cutting, and sports performance for basketball players. 24 basketball players were randomly classified into three groups of 8 each: BCG, BPG, and BCPG,BCG applied basketball+core training group, BPG applied basketball+plyometric training group, and BCPG applied basketball +50%core+50%plyometric training for 8 weeks, and at 0 week, 4 weeks and 8 weeks measured the lower extremity kinematic variables and muscle activity during side cutting, and sports performance. To evaluate lower extremity kinematic variables, the knee joint and hip joint angles at initial contact and the maximum angle of knee joint and hip joint during the stance phase were analyzed. Muscle activity of the gluteus maximus, gluteus medius, quadriceps femoris, hamstrings and the ratios of hamstrings:quadriceps(H:Q), and vastus medialis:vastus lateralis(VM:VL) were analyzed 50ms before landing and in the loading phase. To measure general sports performance, counter movement jump, change of direction, sprint(5m, 10m sprint), and repeated sprint ability tests were conducted. The results were as follows. First, after applying the training program for 4 weeks, the hip joint internal rotation at initial contact of BPG significantly increased. Second, after applying the training program for 8 weeks, the muscle pre-activity of the semitendinosus and biceps femoris before initinal contact of BCG and BCPG significantly increased, and the muscle pre-activity of the rectus femoris muscle of BPG significantly decreased, but the muscle pre-activity of the semitendinosus and H/Q ratio was significantly increased, and the gluteus medius activity of BCG during the loading phase was significantly higher than BPG. Third, after applying the training program for 8 weeks, the counter movement jump, change of direction, repeated sprint, and basketball skill ability in BCG were significantly increased, the counter movement jump, change of direction, sprint, repeated sprint, and basketball skill ability in BCG were significantly increased, the counter movement jump and change of direction ability in BCPG were significantly increased. This study conducted a comparative study on lower extremity kinematics and muscle activity during side cutting in basketball players after core and plyometric training. Both types of training were able to improve the side cutting function and sports performance of basketball players, and are expected to provide useful information for preventing injuries and improving sports performance related to side cutting in basketball players.