The Effect of the EMG Activity of the Lower Leg with Dynamic Balance of the Recreational Athletes with Functional Ankle Instability

Ahn, Chang Sik; Kim, Ho Sung; Kim, Myung Chul

doi:10.1589/jpts.23.579

Cited by 10 publications

(4 citation statements)

References 25 publications

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“…Table 7 reports data extracted from the four articles. The study by Ahn [81] reported that, in CAI participants compared to controls, PL-, TA-, and BF-EMG amplitude was lower in the anterior direction, TA-and The onset of muscle activity was calculated on the basis of the onset of displacement of the COP in the mediolateral plane (i. e., the beginning of the transition from the double leg stance position to the singleleg stance position). An increase of more than 2 standard deviations on top of the mean baseline activity was identified as the onset of muscle activity in reaction to the transition.…”

Section: Muscle Activations During Star Excursion Balance Taskmentioning

confidence: 99%

Muscle activations during functional tasks in individuals with chronic ankle instability: a systematic review of electromyographical studies

et al. 2021

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Section: Muscle Activations During Star Excursion Balance Taskmentioning

confidence: 99%

Muscle activations during functional tasks in individuals with chronic ankle instability: a systematic review of electromyographical studies

et al. 2021

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“…In another EMG study, normalized peak EMG activity of the rectus femoris (RF) and vastus lateralis (VL) was greater than 74% in subjects with stable ankle groups in the posteromedial and posterolateral directions. In the same study, the activation values of the RF and VL muscles were found to be greater than 55% in the anterior direction [34]. In another study, high levels of activation of the RF (32-42.4%), VL (65.9-88.5%), and VM (63.2-97.1%) muscles were found with respect to three directions [35].…”

Section: Discussionmentioning

confidence: 72%

Relationship between Unilateral Leg Extension Strength and Dynamic Balance in Healthy Young Men

et al. 2022

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It is well known that the quadriceps muscle group is involved in activity during dynamic balance and that dynamic balance tests are an important feedback tool for predicting lower limb injuries. However, the relationship between maximum leg extension strength and performance in the Y Balance Test is not fully known. The aim of this study was to investigate the relationship between unilateral leg extension strength and dynamic balance in healthy young men. The study was conducted as a cross-sectional study. A total of 33 healthy men (mean age ± standard deviation = 21.21 ± 1.24 years) volunteered for this study. The participants’ dynamic balance was determined with the Y Balance Test and unilateral one repetition maximum strength was determined by the leg extension machine. The same side was preferred for strength and dynamic balance measurements. Normalized reach, composite score, and absolute and relative strength values were analyzed for correlations. Linear regression analysis was used to determine whether strength values predicted the results of the Y Balance Test. There was a positive linear correlation between the strength values and normalized reach distances and composite scores (r ranges from 0.466 to 0.757; p < 0.01). The coefficients of determination showed that dynamic balance and strength (absolute and relative) performance are not independent parameters in healthy young men (r2 = 21–57% explained variance). It was also found that strength values (absolute and relative) can predict balance. Our study confirmed the relationship between strength and dynamic balance. It can be said that especially the strength of the lower extremity has an acceptable effect on dynamic balance.

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“…For the LM, the electrode was attached to an area 3 cm away toward the exterior from the L5 spur. For the ES, the electrode was attached to an area 2 cm away toward both sides of the L2 [27,28]. EMG signals collected during the endurance test were analyzed based on the power spectrum through the fast Fourier transform.…”

Section: Muscle Fatiguementioning

confidence: 99%

Immediate Effect of Trunk Flexion And Extension Isometric Exercise Using An External Compression Device On Electromyography of The Hip Extensor And Trunk Range of Motion Of Healthy Subjects

Huang

Kim

2021

Preprint

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Background: Low back pain (LBP) is a very common symptom experienced by individuals across all age groups. Previous study established that using a device known as Active Therapeutic Movement version 2 (ATM®2) has been developed to improve pain and joint range of motion (ROM) in patients with LBP. However, no study has examined the physiological change in the muscle through ATM®2-based exercise thus far. This study aimed to determine the immediate effects of ATM®2 exercise on the contraction timing, back extension endurance, muscle fatigue, and trunk ROM of lumbar and lower limb muscles in healthy subjects.Methods: Thirty-six healthy subjects (mean age=23.16±2.3) volunteered to participate in this study. Subjects were instructed to perform ROM test using sit and reach test, back extensor endurance test using Biering-Sorensen test, erector spinae (ES), lumbar multifidus (LM) fatigue and onset time of Gluteus maximus (GM) in prone hip extension using electromyography before and after trunk flexion and extension isometric exercises.Results: The ROM in trunk flexion showed a significant increase by 7.9% after exercise compared to that before exercise (p<0.05). Relative GM contraction onset timing significantly decreased after exercise (p<0.05). The result of the Sorensen test after exercise showed a trend of increase in duration time. Muscle fatigue in the LM, however, showed a significant increase (p<0.05), whereas muscle fatigue in the ES was reduced without statistical significance.Conclusions: The results base on this study showed a significant increase in the trunk ROM after trunk flexion and extension isometric exercise using an external compression device, while the relative contraction onset timing in the GM significantly reduced. Furthermore, the muscle endurance test after exercise showed a trend of increase in the duration time with a decreasing trend in muscle fatigue in the ES. Exercise based on ATM®2 is an effective exercise protocol with an effect on biomechanics of healthy subjects. This exercise may be suitable in clinical practice for patients with LBP, for which long-term effects can be expected.

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The Effect of the EMG Activity of the Lower Leg with Dynamic Balance of the Recreational Athletes with Functional Ankle Instability

Cited by 10 publications

References 25 publications

Muscle activations during functional tasks in individuals with chronic ankle instability: a systematic review of electromyographical studies

Muscle activations during functional tasks in individuals with chronic ankle instability: a systematic review of electromyographical studies

Relationship between Unilateral Leg Extension Strength and Dynamic Balance in Healthy Young Men

Immediate Effect of Trunk Flexion And Extension Isometric Exercise Using An External Compression Device On Electromyography of The Hip Extensor And Trunk Range of Motion Of Healthy Subjects

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