Acute Effects of Open Kinetic Chain Exercise Versus Those of Closed Kinetic Chain Exercise on Quadriceps Muscle Thickness in Healthy Adults

Soul Cheon, Joo-Hyun Lee, Hyung-Pil Jun, Yong Woo An and Eunwook Chang
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Soul Cheon: Department of Kinesiology, Inha University, Incheon 22212, Korea
Joo-Hyun Lee: Department of Kinesiology, Inha University, Incheon 22212, Korea
Hyung-Pil Jun: Department of Physical Education, Dong-A University, Busan 49236, Korea
Yong Woo An: Department of Health and Human Sciences, Loyola Marymount University, Los Angeles, CA 90045, USA
Eunwook Chang: Department of Kinesiology, Inha University, Incheon 22212, Korea

IJERPH, 2020, vol. 17, issue 13, 1-11

Abstract: This study aimed to compare immediate changes in the thickness of the rectus femoris (RF), vastus intermedius (VI), vastus lateralis (VL), vastus medialis (VM), and vastus medialis oblique (VMO) muscles after open kinetic chain exercise (OKCE) and closed kinetic chain exercise (CKCE) and identify the effect of both exercise types on each quadricep muscle for early rehabilitation to prevent knee joint injury. Twenty-six healthy participants (13 males and 13 females) were randomly divided into the OKCE ( n = 13) and CKCE ( n = 13) groups. The thickness of their quadriceps muscles was measured using a portable ultrasonic imaging device before and after exercise in the sequence RF, VI, VL, VM, and VMO. A two-way repeated measures analysis of variance was used to compare the thickness of each component of the quadriceps muscles between the two groups. The thickness of the RF, VL, VM, and VMO muscles increased after OKCE, and the thickness of the VI muscle showed the greatest increase with a medium–large effect size (F = 8.52, p = 0.01, and d = 0.53). The thickness of the VI, VL, VM, and VMO muscles increased after CKCE, and the VMO muscle had the largest effect size (F = 11.71, p = 0.00, and d = 1.02). These results indicate that the thickness of the quadriceps muscles can be selectively improved depending on the type of exercise.

Keywords: quadriceps atrophy; vastus intermedius; vastus medialis; vastus medialis oblique; muscle hypertrophy; resistance exercise; type of exercise (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
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