Age Differences in Motor Recruitment Patterns of the Shoulder in Dynamic and Isometric Contractions. A Cross-Sectional Study
Aging processes in the musculoskeletal system lead to functional impairments that restrict participation. Purpose: To assess differences in the force and motor recruitment patterns of shoulder muscles between age groups to understand functional disorders. A cross-sectional study comparing 30 adults...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-02-01
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| Series: | Journal of Clinical Medicine |
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| Online Access: | https://www.mdpi.com/2077-0383/10/3/525 |
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| author | Cristina Lirio-Romero Rocío Palomo-Carrión Helena Romay-Barrero Asunción Ferri-Morales Virginia Prieto-Gómez María Torres-Lacomba |
| author_facet | Cristina Lirio-Romero Rocío Palomo-Carrión Helena Romay-Barrero Asunción Ferri-Morales Virginia Prieto-Gómez María Torres-Lacomba |
| author_sort | Cristina Lirio-Romero |
| collection | DOAJ |
| description | Aging processes in the musculoskeletal system lead to functional impairments that restrict participation. Purpose: To assess differences in the force and motor recruitment patterns of shoulder muscles between age groups to understand functional disorders. A cross-sectional study comparing 30 adults (20–64) and 30 older adults (>65). Surface electromyography (sEMG) of the middle deltoid, upper and lower trapezius, infraspinatus, and serratus anterior muscles was recorded. Maximum isometric voluntary contraction (MIVC) was determined at 45° glenohumeral abduction. For the sEMG signal registration, concentric and eccentric contraction with and without 1 kg and isometric contraction were requested. Participants abducted the arm from 0° up to an abduction angle of 135° for concentric and eccentric contraction, and from 0° to 45°, and remained there at 80% of the MIVC level while isometrically pushing against a handheld dynamometer. Differences in sEMG amplitudes (root mean square, RMS) of all contractions, but also onset latencies during concentric contraction of each muscle between age groups, were analyzed. Statistical differences in strength (Adults > Older adults; 0.05) existed between groups. No significant differences in RMS values of dynamic contractions were detected, except for the serratus anterior, but there were for isometric contractions of all muscles analyzed (Adults > Older adults; 0.05). The recruitment order varied between age groups, showing a general tendency towards delayed onset times in older adults, except for the upper trapezius muscle. Age differences in muscle recruitment patterns were found, which underscores the importance of developing musculoskeletal data to prevent and guide geriatric shoulder pathologies. |
| first_indexed | 2024-03-09T06:07:57Z |
| format | Article |
| id | doaj.art-1a1808a9cbaf499f8930e4404eb0e21a |
| institution | Directory Open Access Journal |
| issn | 2077-0383 |
| language | English |
| last_indexed | 2024-03-09T06:07:57Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Clinical Medicine |
| spelling | doaj.art-1a1808a9cbaf499f8930e4404eb0e21a2023-12-03T12:00:50ZengMDPI AGJournal of Clinical Medicine2077-03832021-02-0110352510.3390/jcm10030525Age Differences in Motor Recruitment Patterns of the Shoulder in Dynamic and Isometric Contractions. A Cross-Sectional StudyCristina Lirio-Romero0Rocío Palomo-Carrión1Helena Romay-Barrero2Asunción Ferri-Morales3Virginia Prieto-Gómez4María Torres-Lacomba5Faculty of Physiotherapy and Nursing, Physiotherapy and Occupational Therapy Department, University of Castilla-La Mancha, Avda, Carlos III s/n, 45004 Toledo, SpainFaculty of Physiotherapy and Nursing, Physiotherapy and Occupational Therapy Department, University of Castilla-La Mancha, Avda, Carlos III s/n, 45004 Toledo, SpainFaculty of Physiotherapy and Nursing, Physiotherapy and Occupational Therapy Department, University of Castilla-La Mancha, Avda, Carlos III s/n, 45004 Toledo, SpainFaculty of Physiotherapy and Nursing, Physiotherapy and Occupational Therapy Department, University of Castilla-La Mancha, Avda, Carlos III s/n, 45004 Toledo, SpainPhysiotherapy in Women’s Health (FPSM) Research Group, Physiotherapy Department, Faculty of Medicine and Health Sciences, University of Alcalá, Alcalá de Henares, 28805 Madrid, SpainPhysiotherapy in Women’s Health (FPSM) Research Group, Physiotherapy Department, Faculty of Medicine and Health Sciences, University of Alcalá, Alcalá de Henares, 28805 Madrid, SpainAging processes in the musculoskeletal system lead to functional impairments that restrict participation. Purpose: To assess differences in the force and motor recruitment patterns of shoulder muscles between age groups to understand functional disorders. A cross-sectional study comparing 30 adults (20–64) and 30 older adults (>65). Surface electromyography (sEMG) of the middle deltoid, upper and lower trapezius, infraspinatus, and serratus anterior muscles was recorded. Maximum isometric voluntary contraction (MIVC) was determined at 45° glenohumeral abduction. For the sEMG signal registration, concentric and eccentric contraction with and without 1 kg and isometric contraction were requested. Participants abducted the arm from 0° up to an abduction angle of 135° for concentric and eccentric contraction, and from 0° to 45°, and remained there at 80% of the MIVC level while isometrically pushing against a handheld dynamometer. Differences in sEMG amplitudes (root mean square, RMS) of all contractions, but also onset latencies during concentric contraction of each muscle between age groups, were analyzed. Statistical differences in strength (Adults > Older adults; 0.05) existed between groups. No significant differences in RMS values of dynamic contractions were detected, except for the serratus anterior, but there were for isometric contractions of all muscles analyzed (Adults > Older adults; 0.05). The recruitment order varied between age groups, showing a general tendency towards delayed onset times in older adults, except for the upper trapezius muscle. Age differences in muscle recruitment patterns were found, which underscores the importance of developing musculoskeletal data to prevent and guide geriatric shoulder pathologies.https://www.mdpi.com/2077-0383/10/3/525shouldermusculoskeletal disorderssurface electromyographyage groupsaging |
| spellingShingle | Cristina Lirio-Romero Rocío Palomo-Carrión Helena Romay-Barrero Asunción Ferri-Morales Virginia Prieto-Gómez María Torres-Lacomba Age Differences in Motor Recruitment Patterns of the Shoulder in Dynamic and Isometric Contractions. A Cross-Sectional Study Journal of Clinical Medicine shoulder musculoskeletal disorders surface electromyography age groups aging |
| title | Age Differences in Motor Recruitment Patterns of the Shoulder in Dynamic and Isometric Contractions. A Cross-Sectional Study |
| title_full | Age Differences in Motor Recruitment Patterns of the Shoulder in Dynamic and Isometric Contractions. A Cross-Sectional Study |
| title_fullStr | Age Differences in Motor Recruitment Patterns of the Shoulder in Dynamic and Isometric Contractions. A Cross-Sectional Study |
| title_full_unstemmed | Age Differences in Motor Recruitment Patterns of the Shoulder in Dynamic and Isometric Contractions. A Cross-Sectional Study |
| title_short | Age Differences in Motor Recruitment Patterns of the Shoulder in Dynamic and Isometric Contractions. A Cross-Sectional Study |
| title_sort | age differences in motor recruitment patterns of the shoulder in dynamic and isometric contractions a cross sectional study |
| topic | shoulder musculoskeletal disorders surface electromyography age groups aging |
| url | https://www.mdpi.com/2077-0383/10/3/525 |
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