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Comparison of difference in muscle activity ratio, ground reaction force and knee valgus angle during single leg squat and landing according to dynamic taping
Physical Therapy Rehabilitation Science 2020;9:281-6
Published online December 30, 2020
© 2020 Korean Academy of Physical Therapy Rehabilitation Science.

Tae-Won Haa , Sam-Ho Parka , Myung-Mo Leeb

aDepartment of Physical Therapy, Graduate School, Daejeon University, Daejeon, Republic of Korea
bDepartment of Physical Therapy, Daejeon University, Daejeon, Republic of Korea
Correspondence to: Myung-Mo Lee (ORCID
Department of Physical Therapy, Daejeon University, 62 Daehak-ro, Dong-gu, Daejeon 34520, Republic of Korea
Tel: 82-42-280-4295 Fax: 82-42-280-2295 E-mail:
Received November 30, 2020; Revised December 23, 2020; Accepted December 24, 2020.
cc This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Objective: This study examined the effects of dynamic tape applied to the patellofemoral joint on the knee valgus angle, muscle activity, and ground reaction force during a single leg squat (SLS) and single leg landing (SLL).
Design: Cross-sectional study.
Methods: Twenty-four subjects (11 male, 13 female) who met the inclusion criteria were screened by the knee palpation and patella compression tests. First, the knee valgus angle and muscle activity during SLS were measured. Second, the knee valgus angle and ground reaction force during SLL were measured. For the intervention, a patella joint loop using dynamic tape was used. The knee valgus angle, muscle activities in SLS and SLL after the intervention, and the ground reaction force were measured in the same way. A paired t-test was used to examine the difference between before and after the intervention.
Results: The knee valgus angle showed a statistically significant improvement after dynamic taping application in SLS and SLL (p<0.05). The differences in muscle activity of the VL/VMO and ground reaction forces were not statistically significant after dynamic taping application in SLS and SLL.
Conclusions: This study showed that dynamic taping applied around the patellofemoral joint was effective in improving the knee valgus angle in SLS and SLL and had a reduced risk of secondary injury during sports activity.
Keywords : Athletic tape, Electromyography, Genu valgum, Patellofemoral pain syndrome, Vertical dimension


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