1
|
Yu IY, Ko MJ, Oh JS. The effects of biofeedback training for efficient activation of infraspinatus on proprioception and EMG activity during shoulder external rotation. J Electromyogr Kinesiol 2023; 71:102798. [PMID: 37399603 DOI: 10.1016/j.jelekin.2023.102798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 05/08/2023] [Accepted: 06/26/2023] [Indexed: 07/05/2023] Open
Abstract
The purpose of this study investigated which biofeedback (BF) training enables efficient activation of the infraspinatus muscle that affect joint position sense (JPS) and force sense (FS) of the shoulder joint. Twenty healthy males participated and performed three external rotation (ER) exercises under three randomly assigned training conditions: 1) non-biofeedback (NBF), 2) BF and 3) force biofeedback (FBF). Each exercise was performed at intervals of one week between training conditions. After performed the ER exercise under each training condition, the relative error (RE) was calculated at shoulder ER 45° and 80°, and then shoulder ER force were measured to determine the JPS error and FS error, respectively. Muscle activity of infraspinatus and posterior deltoid were measured and compared between training conditions. The RE of shoulder ER 45° and 80° were significantly lower under the FBF conditions than other training conditions (P < 0.05). The RE of shoulder ER force were also significantly lower under the FBF conditions compared to those under the other training conditions (P < 0.05). The activity of the infraspinatus muscle was significantly higher under the FBF conditions during all three ER exercises than other training conditions (p < 0.05). We suggest that BF trainings can be useful to improve the proprioception of shoulder joint as well as activation of infraspinatus muscle while performing the ER exercises.
Collapse
Affiliation(s)
- Il-Young Yu
- Department of Rehabilitation Center, Dang Dang Korean Medicine Hospital, Changwon, Republic of Korea.
| | - Min-Joo Ko
- Department of Physical Therapy, INJE university, Gimhae, Republic of Korea.
| | - Jae-Seop Oh
- Department of Physical Therapy, College of Biomedical Science and Engineering, INJE University, Gimhae, Republic of Korea.
| |
Collapse
|
2
|
Yu IY, Kang MH. Influence of scapular motion cues on trapezius muscle activity during Y exercise. J Back Musculoskelet Rehabil 2023; 36:1171-1178. [PMID: 37458020 DOI: 10.3233/bmr-220366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
BACKGROUND The Y exercise is a therapeutic exercise facilitating lower trapezius muscle activity. OBJECTIVE To identify the effects of scapular movement cues (posterior tilt vs. posterior tilt with adduction/depression) on trapezius muscle activity during Y exercise. METHODS Fifteen healthy men without current shoulder pain performed general Y exercise; Y exercise with cues for scapular posterior tilt; and Y exercise with cues for scapular posterior tilt, adduction, and depression. Electromyography (EMG) data for the trapezius muscles were collected during Y exercise. The posterior tilt angle of the scapula was measured in the prone position with and without cues for scapular posterior tilt using an inclinometer application. RESULTS The greatest lower trapezius muscle activity was observed during Y exercise with cues for scapular posterior tilt, while the greatest EMG activity of the upper trapezius was observed during Y exercise with cues for scapular posterior tilt, adduction, and depression (p< 0.05). Middle trapezius muscle activity did not significantly differ among the three Y exercise conditions (p= 0.175). Cues for scapular posterior tilt significantly increased the scapular posterior tilt angle in the prone shoulder abduction position (p= 0.007). CONCLUSION Cues for scapular posterior tilt were most effective in facilitating lower trapezius muscle activity during Y exercise.
Collapse
Affiliation(s)
- Il-Young Yu
- Rehabilitation Center, Dang Dang Korean Medicine Hospital, Changwon, Korea
| | - Min-Hyeok Kang
- Department of Physical Therapy, College of Health Sciences, Catholic University of Pusan, Busan, Korea
| |
Collapse
|
3
|
Kim SY, Yu IY, Kang MH. The effects of pressure biofeedback on hip and trunk muscle activity and lumbopelvic alignment during one-leg standing. ISOKINET EXERC SCI 2021. [DOI: 10.3233/ies-202173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND: During one-leg standing (OLS), optimum activity of the gluteus medius (Gmed), multifidus (MF), and quadratus lumborum (QL) muscles relies upon maintaining neutral lumbopelvic alignment. However, no studies have examined how using pressure biofeedback during OLS affects the activity of these muscles and the concomitant alignment of the pelvis and trunk. OBJECTIVES: The purpose of this study was to investigate the effect of pressure biofeedback on the activity of the Gmed, MF, and QL and the femoropelvic and trunk lean angles during OLS. METHODS: Twenty-four healthy males performed OLS with (PB+) and without (PB-) pressure biofeedback. For all OLS conditions, a pressure sensor was placed between the lateral surface of the humerus on the non-supporting side and the wall. Under the PB- condition, participants performed preferred OLS while the examiner measured the maximum pressure caused by trunk lean. Under the PB+ condition, participants were asked to perform at a threshold of 50% of the maximal pressure (PB+ 1 condition) and with minimal change in pressure (PB+ 2 condition). Muscle activities of MF, QL, and Gmed as well as the femoropelvic and trunk lean angles were measured under various OLS conditions. RESULTS: The activity of the Gmed, MF, and QL was greater under both PB+ conditions than under the PB- condition (p< 0.05). Also, both PB+ conditions resulted in a greater femoropelvic angle and reduced trunk lean angle. There were no significant differences in muscle activity, femoropelvic angle, or trunk lean angle between PB+ 1 and PB+ 2 (p> 0.05). CONCLUSIONS: These results suggest that pressure biofeedback is a useful modality for increasing the activity of the Gmed and trunk muscles, especially the MF muscle on the non-supporting leg side, and for preventing compensatory movements such as trunk deviation and pelvic lateral deviation during OLS.
Collapse
Affiliation(s)
- Soo-Yong Kim
- Department of Physical Therapy, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Il-Young Yu
- Department of Rehabilitation Center, Dang Dang Korean Medicine Hospital, Changwon, Korea
| | - Min-Hyeok Kang
- Department of Physical Therapy, College of Health Sciences, Catholic University of Pusan, Busan, Korea
| |
Collapse
|
4
|
Yu IY, Kim SY, Kang MH. Strategies for controlling axial shoulder rotation change shoulder muscle activity during external rotation exercises. J Shoulder Elbow Surg 2021; 30:1230-1237. [PMID: 32920111 DOI: 10.1016/j.jse.2020.08.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 08/11/2020] [Accepted: 08/17/2020] [Indexed: 02/01/2023]
Abstract
BACKGROUND The infraspinatus muscle has a crucial role in shoulder stability. Although axial shoulder rotation is useful for selective activation of the infraspinatus, no study has examined the influence of exercise position on axial shoulder rotation during shoulder external rotation (ER) exercises. Thus, this study investigated the muscle activity in the infraspinatus, posterior deltoid, and middle trapezius during shoulder ER exercises performed with and without controlled axial shoulder rotation in 2 different positions. METHODS Twenty healthy subjects performed prone external rotation (PER) exercises with and without pressure biofeedback and seated external rotation (SITER) exercises with and without posterior humeral head gliding. Muscle activity during each ER exercise was measured using surface electromyography. RESULTS Exercise strategy (P < .001) and position (P < .001) had a significant main effect on muscle activity in the infraspinatus and posterior deltoid. However, no significant interaction between strategy and position was observed. For muscle activity in the middle trapezius, strategy and position had a significant interaction effect (P = .014). Muscle activity in the infraspinatus increased significantly with the use of strategies to control axial shoulder rotation, whereas muscle activity in the posterior deltoid and middle trapezius decreased significantly. For all 3 muscles, greater activity was observed in the prone position than the seated position. CONCLUSION We suggest that PER with pressure biofeedback can be useful to improve selective activation of the infraspinatus muscle while further eliciting infraspinatus muscle activity.
Collapse
Affiliation(s)
- Il-Young Yu
- Department of Rehabilitation Center, Dang Dang Korean Medicine Hospital, Changwon, Republic of Korea
| | - Soo-Yong Kim
- Department of Physical Therapy, Pusan National University Yangsan Hospital, Yangsan, Republic of Korea
| | - Min-Hyeok Kang
- Department of Physical Therapy, College of Health Sciences, Catholic University of Pusan, Busan, Republic of Korea.
| |
Collapse
|
5
|
Kang MH, Kim SY, Yu IY, Oh JS. Effects of real-time visual biofeedback of pelvic movement on electromyographic activity of hip muscles and lateral pelvic tilt during unilateral weight-bearing and side-lying hip abduction exercises. J Electromyogr Kinesiol 2019; 48:31-36. [DOI: 10.1016/j.jelekin.2019.06.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 05/07/2019] [Accepted: 06/06/2019] [Indexed: 10/26/2022] Open
|
6
|
Yu IY, Oh SI, Jung WJ, Oh J. Appropriate Resistance Intensity and Effective Exercise for Activation of Infraspinatus. Int J Sports Med 2019; 40:569-575. [PMID: 31319428 DOI: 10.1055/a-0960-9676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
We investigated the muscle activities of the infraspinatus and posterior deltoid, as well as the ratio of the infraspinatus to posterior deltoid muscle activities, in response to 3 resistance intensities during prone external rotation (PER) and sitting external rotation (SITER) exercises. Fifteen healthy males participated; the subjects performed two exercises randomly at three resistance intensity levels: 1) low intensity (10-20%); 2) medium intensity (45-55%); 3) high intensity (60-70%). Surface electromyography was used to measure the activities of the infraspinatus and posterior deltoid muscles. The activities of the infraspinatus and posterior deltoid increased significantly as the resistance intensity increased during both PER and SITER exercises (p<0.001). The infraspinatus-to-posterior deltoid activity ratio increased as the resistance intensity decreased. Whereas the muscle activity ratio was highest under low and medium intensity during PER and SITER, respectively, and the muscle activity ratio was significantly increased at medium intensity compared with high intensity during both PER (p=0.023) and SITER (p=0.001). Our results suggest that low to medium intensity is the appropriate resistance intensity for selective activation of the infraspinatus. In addition, our results suggest that PER and SITER are effective for strengthening the infraspinatus.
Collapse
Affiliation(s)
- Il-Young Yu
- Rehabilitation Science, Inje University, Gimhae, Korea (the Republic of)
| | - Se-Il Oh
- Physical Therapy, Inje University, Gimhae, Korea (the Republic of)
| | - Won-Jeong Jung
- Physical Therapy, Inje University, Gimhae, Korea (the Republic of)
| | - Jaeseop Oh
- Physical Therapy, Inje University, Gimhae, Korea (the Republic of)
| |
Collapse
|
7
|
Yu IY, Choo YK, Kim MH, Oh JS. The effects of pressure biofeedback training on infraspinatus muscle activity and muscle thickness. J Electromyogr Kinesiol 2018; 39:81-88. [DOI: 10.1016/j.jelekin.2018.01.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 11/30/2017] [Accepted: 01/17/2018] [Indexed: 11/30/2022] Open
|
8
|
Yu IY, Jung IG, Kang MH, Lee DK, Oh JS. Immediate effects of an end-range mobilization technique on shoulder range of motion and skin temperature in individuals with posterior shoulder tightness. J Phys Ther Sci 2015; 27:1723-5. [PMID: 26180306 PMCID: PMC4499969 DOI: 10.1589/jpts.27.1723] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Accepted: 02/14/2015] [Indexed: 11/24/2022] Open
Abstract
[Purpose] This study investigated the effects of an end-range mobilization technique on
the range of motion of the glenohumeral internal rotation and the skin temperature of the
shoulder in individuals with posterior shoulder tightness. [Subjects] Thirteen subjects
with posterior shoulder tightness who had glenohumeral internal rotation deficit ≥ 15°
participated. [Methods] All subjects underwent glenohumeral joint end-range mobilization
intervention. The internal rotation range of motion of the glenohumeral joint was measured
by a goniometer and the shoulder skin temperature was measured by a digital infrared
thermographic imaging device before and immediately after the intervention. Paired t-tests
were used to analyze the differences in these parameter pre and post-intervention.
[Results] The glenohumeral internal rotation range of motion and skin temperature of the
posterolateral shoulder in increased significantly post-intervention. [Conclusion] The
end-range mobilization technique is effective for increasing the glenohumeral internal
rotation range of motion and skin temperature of the shoulder in individuals with
posterior shoulder tightness.
Collapse
Affiliation(s)
- Il-Young Yu
- Department of Physical Therapy, Graduate School, Inje University, Republic of Korea
| | - In-Gui Jung
- Department of Physical Therapy, Graduate School, Inje University, Republic of Korea
| | - Min-Hyeok Kang
- Department of Rehabilitation Science, Graduate School, Inje University, Republic of Korea
| | - Dong-Kyu Lee
- Department of Rehabilitation Science, Graduate School, Inje University, Republic of Korea
| | - Jae-Seop Oh
- Department of Physical Therapy, College of Biomedical Science and Engineering, Inje University, Republic of Korea
| |
Collapse
|
9
|
Jung IG, Yu IY, Kim SY, Lee DK, Oh JS. Reliability of ankle dorsiflexion passive range of motion measurements obtained using a hand-held goniometer and Biodex dynamometer in stroke patients. J Phys Ther Sci 2015; 27:1899-901. [PMID: 26180344 PMCID: PMC4500007 DOI: 10.1589/jpts.27.1899] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 03/07/2015] [Indexed: 11/24/2022] Open
Abstract
[Purpose] This study investigated the reliability of ankle dorsiflexion passive range of motion (DF-PROM) measurements obtained using a goniometer and Biodex dynamometer in stroke patients. [Subjects] Fifteen stroke patients participated in this study. [Methods] Ankle DF-PROM was assessed using a goniometer and Biodex dynamometer. Ankle DF-PROM was measured during two sessions with 7 days between tests. Intraclass correlation coefficient, standard error of measurement, and minimal detectable change values were used to assess the reliability of measurements obtained using both instruments. [Results] The intra-rater reliability for ankle DF-PROM using the goniometer was moderate and good for the two raters, while using the Biodex dynamometer, it was good for both raters. Inter-rater reliability using the goniometer was moderate; using the Biodex, it was good. [Conclusion] Both intra- and inter-reliability measurements of ankle DF-PROM were higher using a Biodex dynamometer than with a goniometer.
Collapse
Affiliation(s)
- In-Gui Jung
- Department of Physical Therapy, Graduate School, Inje University, Republic of Korea
| | - Il-Young Yu
- Department of Physical Therapy, Graduate School, Inje University, Republic of Korea
| | - Soo-Yong Kim
- Department of Physical Therapy, Graduate School, Inje University, Republic of Korea
| | - Dong-Kyu Lee
- Department of Rehabilitation Science, Graduate School, Inje University, Republic of Korea
| | - Jae-Seop Oh
- Department of Physical Therapy, College of Biomedical Science and Engineering, Inje University, Republic of Korea
| |
Collapse
|
10
|
Lee DK, Yu IY, Jung IG, Oh JS. Effects of lifting the non-paretic foot on muscle activity during the semi-squat exercise in hemiplegic patients. J Phys Ther Sci 2015; 27:1869-70. [PMID: 26180338 PMCID: PMC4500001 DOI: 10.1589/jpts.27.1869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2015] [Accepted: 03/07/2015] [Indexed: 11/24/2022] Open
Abstract
[Purpose] This study compared the electromyographic activity of the quadriceps in
hemiplegic patients during the downward, maintenance, and upward phases of squat exercises
performed with the feet parallel and with the non-paretic foot lifted. [Subjects] A total
of 17 hemiplegic patients (9 males and 8 females) volunteered for this study. [Methods]
All subjects performed squat exercises with the knees flexed to 30° and with the feet
parallel (shoulder-width apart) or with lifting of the non-paretic foot (normalized to 25%
of the knee height). [Results] The activity of the rectus femoris, vastus medialis
oblique, and vastus lateralis muscles was significantly higher during squat exercises
performed with the non-paretic foot lifted than with the feet parallel to each other. The
activity of all muscles during the maintenance phase of the exercises was greater than
that during the downward and upward phases. [Conclusion] Lifting the non-paretic foot
during squats may represent an effective exercise for motor function rehabilitation in
hemiplegic patients.
Collapse
Affiliation(s)
- Dong-Kyu Lee
- Department of Physical Therapy, Graduate School, Inje University, Republic of Korea
| | - Il-Young Yu
- Department of Physical Therapy, Graduate School, Inje University, Republic of Korea
| | - In-Gui Jung
- Department of Physical Therapy, Graduate School, Inje University, Republic of Korea
| | - Jae-Seop Oh
- Department of Physical Therapy, College of Biomedical Science and Engineering, Inje University: 607 Obang-dong, Gimhae-si, Gyeongsangnam-do 621-749, Republic of Korea
| |
Collapse
|