Comparison of Knee Muscle Strength and Ankle Dorsiflexion Range of Motion Between Standing Workers With and Without Patellofemoral Pain Syndrome
Background: Prolonged standing during work causes a lower extremity pain and disorders. Patellofemoral pain syndrome (PFPS) is one of the common diagnoses of the knee pain. Although the etiology of PFPS is not completely understood, it is considered to be multifactorial. Objects: The purpose of t...
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| Format: | Article |
| Language: | English |
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Korean Research Society of Physical Therapy
2020-11-01
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| Series: | Physical Therapy Korea |
| Subjects: |
| _version_ | 1797221925959761920 |
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| author | Young-soo Weon Sun-hee Ahn Jun-hee Kim Gyeong-tae Gwak Oh-yun Kwon |
| author_facet | Young-soo Weon Sun-hee Ahn Jun-hee Kim Gyeong-tae Gwak Oh-yun Kwon |
| author_sort | Young-soo Weon |
| collection | DOAJ |
| description | Background: Prolonged standing during work causes a lower extremity pain and disorders.
Patellofemoral pain syndrome (PFPS) is one of the common diagnoses of the knee pain. Although
the etiology of PFPS is not completely understood, it is considered to be multifactorial.
Objects: The purpose of this study was to investigate difference in strength of knee muscles,
quadriceps:hamstring muscles strength ratio (Q:H ratio), asymmetry ratio of knee muscles
strength and dorsiflexion range of motion (ROM) between standing workers with and without
PFPS.
Methods: Twenty-eight standing workers with PFPS and 26 age-, height-, and weightmatched
standing workers without PFPS participated in this study. A tension sensor measured
knee muscle strength, and motion sensor measured dorsiflexion ROM. The asymmetry ratio
of knee muscles was calculated by a specific formula using the knee muscles strength of the
dominant side and the sound side. An independent t-test was used to identify significant differences
in the strength, ROM, Q:H ratio, and asymmetry ratio between the PFPS and normal
groups.
Results: The standing worker with PFPS have significantly lower dorsiflexion ROM (p <
0.000) and higher asymmetry ratio of the hamstring muscles strength (p < 0.000) compare
to the standing worker without PFPS. No significant differences were seen in the strength
of quadriceps muscle and hamstring muscles, Q:H ratio, and asymmetry ratio of quadriceps
muscle strength.
Conclusion: There was a significant difference in the asymmetry ratio of the isometric hamstring
muscle strength. This finding suggests that the asymmetry ratio of isometric hamstring
muscle strength may be more important than measuring only the hamstring muscle strength
of the PFPS side. Furthermore, the results of this study showed a significant difference in dorsiflexion
ROM between the standing industrial workers with and without PFPS. Dorsiflexion
ROM and isometric hamstring muscle strength should be considered when evaluating the
subjects with PFPS. |
| first_indexed | 2024-04-24T13:13:11Z |
| format | Article |
| id | doaj.art-cd12367cc87f4ef8ae0a0d9cc75cb6c5 |
| institution | Directory Open Access Journal |
| issn | 1225-8962 2287-982X |
| language | English |
| last_indexed | 2024-04-24T13:13:11Z |
| publishDate | 2020-11-01 |
| publisher | Korean Research Society of Physical Therapy |
| record_format | Article |
| series | Physical Therapy Korea |
| spelling | doaj.art-cd12367cc87f4ef8ae0a0d9cc75cb6c52024-04-05T02:44:59ZengKorean Research Society of Physical TherapyPhysical Therapy Korea1225-89622287-982X2020-11-0127424124910.12674/ptk.2020.27.4.241Comparison of Knee Muscle Strength and Ankle Dorsiflexion Range of Motion Between Standing Workers With and Without Patellofemoral Pain SyndromeYoung-soo Weon0https://orcid.org/0000-0003-3852-606XSun-hee Ahn1https://orcid.org/0000-0001-7660-8598Jun-hee Kim2https://orcid.org/0000-0002-0498-7207Gyeong-tae Gwak3https://orcid.org/0000-0003-1812-8910Oh-yun Kwon4https://orcid.org/0000-0002-9699-768XDepartment of Physical Therapy, The Graduate School, Yonsei University, Wonju, KoreaDepartment of Physical Therapy, College of Health Science, Yonsei University, Wonju, KoreaDepartment of Physical Therapy, College of Health Science, Yonsei University, Wonju, KoreaDepartment of Physical Therapy, The Graduate School, Yonsei University, Wonju, KoreaDepartment of Physical Therapy, College of Health Science, Yonsei University, Wonju, KoreaBackground: Prolonged standing during work causes a lower extremity pain and disorders. Patellofemoral pain syndrome (PFPS) is one of the common diagnoses of the knee pain. Although the etiology of PFPS is not completely understood, it is considered to be multifactorial. Objects: The purpose of this study was to investigate difference in strength of knee muscles, quadriceps:hamstring muscles strength ratio (Q:H ratio), asymmetry ratio of knee muscles strength and dorsiflexion range of motion (ROM) between standing workers with and without PFPS. Methods: Twenty-eight standing workers with PFPS and 26 age-, height-, and weightmatched standing workers without PFPS participated in this study. A tension sensor measured knee muscle strength, and motion sensor measured dorsiflexion ROM. The asymmetry ratio of knee muscles was calculated by a specific formula using the knee muscles strength of the dominant side and the sound side. An independent t-test was used to identify significant differences in the strength, ROM, Q:H ratio, and asymmetry ratio between the PFPS and normal groups. Results: The standing worker with PFPS have significantly lower dorsiflexion ROM (p < 0.000) and higher asymmetry ratio of the hamstring muscles strength (p < 0.000) compare to the standing worker without PFPS. No significant differences were seen in the strength of quadriceps muscle and hamstring muscles, Q:H ratio, and asymmetry ratio of quadriceps muscle strength. Conclusion: There was a significant difference in the asymmetry ratio of the isometric hamstring muscle strength. This finding suggests that the asymmetry ratio of isometric hamstring muscle strength may be more important than measuring only the hamstring muscle strength of the PFPS side. Furthermore, the results of this study showed a significant difference in dorsiflexion ROM between the standing industrial workers with and without PFPS. Dorsiflexion ROM and isometric hamstring muscle strength should be considered when evaluating the subjects with PFPS.hamstring musclesknee jointpatellofemoral pain syndromequadriceps muscle |
| spellingShingle | Young-soo Weon Sun-hee Ahn Jun-hee Kim Gyeong-tae Gwak Oh-yun Kwon Comparison of Knee Muscle Strength and Ankle Dorsiflexion Range of Motion Between Standing Workers With and Without Patellofemoral Pain Syndrome Physical Therapy Korea hamstring muscles knee joint patellofemoral pain syndrome quadriceps muscle |
| title | Comparison of Knee Muscle Strength and Ankle Dorsiflexion Range of Motion Between Standing Workers With and Without Patellofemoral Pain Syndrome |
| title_full | Comparison of Knee Muscle Strength and Ankle Dorsiflexion Range of Motion Between Standing Workers With and Without Patellofemoral Pain Syndrome |
| title_fullStr | Comparison of Knee Muscle Strength and Ankle Dorsiflexion Range of Motion Between Standing Workers With and Without Patellofemoral Pain Syndrome |
| title_full_unstemmed | Comparison of Knee Muscle Strength and Ankle Dorsiflexion Range of Motion Between Standing Workers With and Without Patellofemoral Pain Syndrome |
| title_short | Comparison of Knee Muscle Strength and Ankle Dorsiflexion Range of Motion Between Standing Workers With and Without Patellofemoral Pain Syndrome |
| title_sort | comparison of knee muscle strength and ankle dorsiflexion range of motion between standing workers with and without patellofemoral pain syndrome |
| topic | hamstring muscles knee joint patellofemoral pain syndrome quadriceps muscle |
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