Comparing gender differences in activation of the sternocleidomastoid muscle during the simulation of a repetitive industrial activity: a cross-sectional study.
Objectives. Neck and shoulder problems are increasing among workers, particularly during low-level repetitive tasks. Considering the interaction between neck and shoulder muscles during these tasks, studying the sternocleidomastoid muscle (SCM) activity pattern is crucial. This study aimed to invest...
| Publicado en: | International Journal of Occupational Safety & Ergonomics Vol. 31; no. 3; pp. 665 - 672 |
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| Autores principales: | , , , |
| Formato: | pictorial research tables/charts Journal Article |
| Publicado: |
Taylor & Francis Ltd
Sep2025
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=188605116&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 188605116 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 10803548 39QK jtl: International Journal of Occupational Safety & Ergonomics issn: 10803548 maglogo: N pubinfo: dt: Sep2025 vid: 31 iid: 3 pid: 377 pub: Taylor & Francis Ltd place: Philadelphia, Pennsylvania artinfo: ui: 188605116 182812165 188605116 188605116 10.1080/10803548.2025.2455854 188605116 ppf: 665 ppct: 7 formats: tig: atl: Comparing gender differences in activation of the sternocleidomastoid muscle during the simulation of a repetitive industrial activity: a cross-sectional study. aug: au: Carrer, Helen Cristina Nogueira Cid, Marina Machado Petrilli, Luiza Trevisan Oliveira, Ana Beatriz affil: Department of Physical Therapy, Federal University of São Carlos, Brazil sug: subj: Sternocleidomastoid Muscles Physiology Blue Collar Workers Psychosocial Factors Sex Factors Movement Simulations Muscle Fatigue Evaluation Upper Extremity Physiology Stretching Task Performance and Analysis Human Comparative Studies Cross Sectional Studies Male Female Adult Body Mass Index Industry Electromyography Muscle Contraction Flexion Repeated Measures Analysis of Variance Post Hoc Analysis Chi Square Test T-Tests Descriptive Statistics Data Analysis Software Convenience Sample Funding Source Adult: 19-44 years Male Female ab: Objectives. Neck and shoulder problems are increasing among workers, particularly during low-level repetitive tasks. Considering the interaction between neck and shoulder muscles during these tasks, studying the sternocleidomastoid muscle (SCM) activity pattern is crucial. This study aimed to investigate SCM activity during a simulated repetitive task involving muscle fatigue and upper limb elevation. Methods. Nineteen females and 20 males aged 18–35 years with body mass index 18.5–28 participated. Exclusions included musculoskeletal problems within the past 7 days, circulatory/rheumatic/inflammatory disorders, routine engagement in overhead sports or expertise in repetitive movements. Surface electromyography was used to record SCM activity, normalized using maximum voluntary contractions and converted into the root mean square (rms) and median frequency (MF). Pre-fatigue and post-fatigue periods were the first and last 30 s of the task. The craniocervical flexion test assessed deep cervical flexors and their interaction with SCM activity. Results. The rms of SCMs increased bilaterally post fatigue, regardless of sex. Females showed lower MF values in the SCM left side than males, independent of task duration. Conclusion. There were no gender differences. However, SCM changes during upper limb fatigue may indicate overuse of neck muscles during repetitive tasks involving fatigue and upper limb elevation. pubtype: Academic Journal doctype: pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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