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Phys. Ther. Korea 2019; 26(3): 84-90

Published online August 31, 2019

https://doi.org/10.12674/ptk.2019.26.3.084

© Korean Research Society of Physical Therapy

Ankle Evertor Strength of Healthy Subjects in Different Ankle and Toe Positions

Sun-hee Ahn1,2, Hyun-a Kim1,2, Jun-hee Kim1,2, Kyung-tae Kwak1,2, and Oh-yun Kwon2,3

1Dept. of Physical Therapy, Graduate School, Yonsei University,
2Laboratory of Kinetic Ergocise based on Movement Analysis,
3Dept. of Physical Therapy, College of Health Science, Yonsei University

Correspondence to: Oh-yun Kwon kwonoy@yonsei.ac.kr

Received: August 12, 2019; Revised: August 12, 2019; Accepted: September 11, 2019

Abstract

Background:

Ankle evertor muscles are important for preventing lateral ankle sprain. Since, the evertor muscles cross the ankle and toe joints, the position at which the ankle evertor muscle strength is measured is important. However, no studies have previously investigated the effect of ankle and toe positions on the strength of the ankle evertor muscle.

Objects:

This study is aimed to determine the effect of various ankle and toe joint positions on the strength of the ankle evertor muscles in healthy subjects.

Methods:

Eighteen healthy subjects participated in this study. Isometric ankle evertor strength of the dominant leg was determined in each subject in different ankle and toe positions (dorsiflexion (DF) with toe extension (TE), DF with toe flexion (TF), plantar flexion (PF) with TE, and PF with TF). A 2 by 2 repeated analysis of variance (ANOVA) was used to determine the difference in the evertor strength between the ankle positions (PF and DF) and toe positions (TE and TF).

Results:

The results indicate that there was no significant ankle position by toe position interaction effect (p=.83). However, the ankle evertor strength was significantly increased in the ankle DF position than in the PF position (p<.01), and the ankle evertor strength during eversion with TE was significantly higher than eversion with TF (p<.01).

Conclusion:

The findings of this study suggest that clinicians should consider the ankle and toe positions when measuring the muscle strength and during performance of selective muscle strengthening exercises of the ankle evertor muscles.

Keywords: Ankle evertor, Extensor digitorum longus, Isometric strength, Measurement position

Article

ARTICLE

Phys. Ther. Korea 2019; 26(3): 84-90

Published online August 31, 2019 https://doi.org/10.12674/ptk.2019.26.3.084

Copyright © Korean Research Society of Physical Therapy.

Ankle Evertor Strength of Healthy Subjects in Different Ankle and Toe Positions

Sun-hee Ahn1,2, Hyun-a Kim1,2, Jun-hee Kim1,2, Kyung-tae Kwak1,2, and Oh-yun Kwon2,3

1Dept. of Physical Therapy, Graduate School, Yonsei University,
2Laboratory of Kinetic Ergocise based on Movement Analysis,
3Dept. of Physical Therapy, College of Health Science, Yonsei University

Correspondence to:Oh-yun Kwon kwonoy@yonsei.ac.kr

Received: August 12, 2019; Revised: August 12, 2019; Accepted: September 11, 2019

Abstract

Background:

Ankle evertor muscles are important for preventing lateral ankle sprain. Since, the evertor muscles cross the ankle and toe joints, the position at which the ankle evertor muscle strength is measured is important. However, no studies have previously investigated the effect of ankle and toe positions on the strength of the ankle evertor muscle.

Objects:

This study is aimed to determine the effect of various ankle and toe joint positions on the strength of the ankle evertor muscles in healthy subjects.

Methods:

Eighteen healthy subjects participated in this study. Isometric ankle evertor strength of the dominant leg was determined in each subject in different ankle and toe positions (dorsiflexion (DF) with toe extension (TE), DF with toe flexion (TF), plantar flexion (PF) with TE, and PF with TF). A 2 by 2 repeated analysis of variance (ANOVA) was used to determine the difference in the evertor strength between the ankle positions (PF and DF) and toe positions (TE and TF).

Results:

The results indicate that there was no significant ankle position by toe position interaction effect (p=.83). However, the ankle evertor strength was significantly increased in the ankle DF position than in the PF position (p<.01), and the ankle evertor strength during eversion with TE was significantly higher than eversion with TF (p<.01).

Conclusion:

The findings of this study suggest that clinicians should consider the ankle and toe positions when measuring the muscle strength and during performance of selective muscle strengthening exercises of the ankle evertor muscles.

Keywords: Ankle evertor, Extensor digitorum longus, Isometric strength, Measurement position

Fig 1.

Figure 1.

Ankle evertor measurement position and the Smart KEMA sensor position.

Physical Therapy Korea 2019; 26: 84-90https://doi.org/10.12674/ptk.2019.26.3.084

Fig 2.

Figure 2.

Ankle and toe positions for measuring the ankle evertor strength ( A: dorsiflexion with toe extension, B: dorsiflexion with toe flexion, C: plantarflexion with toe extension, D: plantarflexion with toe flexion).

Physical Therapy Korea 2019; 26: 84-90https://doi.org/10.12674/ptk.2019.26.3.084

Fig 3.

Figure 3.

Ankle evertor strength in different ankle and toe positions (DFTE: dorsiflexion with toe extension, PFTE: plantarflexion with toe extension, DFTF: dorsiflexion with toe flexion, PFTF: plantarflexion with toe flexion, *p<.01).

Physical Therapy Korea 2019; 26: 84-90https://doi.org/10.12674/ptk.2019.26.3.084