Age-related Differences in Shoulder Dynamic and Isometric Contractions

NCT04706169 | Completed

• 1 other identifier: CLirio04
• Study Type: observational
• Target: 60
• Locations: 0 countries
• Sites: N/A

Brief Summary

A cross-sectional descriptive study, in which the surface electromyographic activity of five shoulder muscles was compared in two populations: older adults and adults. The evaluation of the electromyographic data offers a suitable foundation to understand aging process. This supports that surface electromyography provide information about the aged shoulder muscles. Loss of functionality is suffered by a high percentage of older adults, which greatly limits their physical activity. In this sense, this paper presents findings that might be related with possible therapeutic approaches in subsequent studies.

Conditions

Electromyography

Keywords

Age groups; Shoulder muscles; Musculoskeletal diseases

Outcome Measures

Primary Outcomes (2)

• The mean Root Mean Square (RMS) value

  The electromyographic data were captured simultaneously on a computer by using the LabChart® software. Within the time interval from 2 to 4 seconds after contraction initiation a power spectrum analysis was performed together with the determination of RMS values. The mean RMS values were automatically obtained from the software.

  day 1

• onset muscle contraction

  The onset was obtained as the time distance of the interception between the level of pre-activation relative to the onset of arm displacement during dynamic contraction and the linearly interpolated RMS slope

  day 1

Secondary Outcomes (2)

• Maximal isometric voluntary contraction

  day 1

• body mass index

  day 1

Study Arms (2)

Older adults

Participants, without symptoms in the shoulder and / or cervical area (at least the last year), were assigned to the Older adult group: over 65 years.

Device: Surface Electromyography

Adults

Participants, without symptoms in the shoulder and / or cervical area (at least the last year), were assigned to the Adult groups: 20 to 64 years.

Device: Surface Electromyography

Interventions

Surface Electromyography DEVICE

SEMG was used to measure the amplitude and onset of five shoulder muscle electrical signal, performing glenohumeral abduction. In this movement, the middle deltoid muscle was selected because it is a main motor. The infraspinatus muscle represented the rotator cuff muscle group. The middle deltoid muscle was selected as the representative of shoulder abduction because it is a main motor in this movement. The trapezius muscle and the serratus anterior muscle were chosen as representative established of the ascending scapular rotator muscles.

Adults; Older adults

Eligibility Criteria

• Age: 20 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)
• Sampling Method: Non-Probability Sample

Study Population

Participants came from Madrid and Castilla La Mancha (Spain) and voluntarily attended the Unit of the Research Group "Physical Therapy in Women´s Health Processes" in the Department of Physical Therapy, University of Alcalá, and the Ocaña Senior Center.

You may qualify if:

• Healthy subjects
• No previously manifested symptoms in the shoulder joint and/or the neck during the past year,

You may not qualify if:

• Moderate or severe cognitive impairment
• Rheumatologic diseases
• Massive osteoarthritis
• Tumors
• Shoulder joint instability
• Circulatory disorders (hemophilia clotting problems)
• Dermatological problems exacerbated by contact with skin.

Sponsors & Collaborators

• University of Castilla-La Mancha: lead
• University of Alcala: collaborator

Related Publications (3)

• Lirio-Romero C, Anders C, De La Villa-Polo P, Torres-Lacomba M. Implications on older women of age- and sex-related differences in activation patterns of shoulder muscles: A cross-sectional study. J Women Aging. 2019 Nov-Dec;31(6):492-512. doi: 10.1080/08952841.2018.1521654. Epub 2018 Sep 25.

  PMID: 30252611 BACKGROUND

• McManus L, De Vito G, Lowery MM. Analysis and Biophysics of Surface EMG for Physiotherapists and Kinesiologists: Toward a Common Language With Rehabilitation Engineers. Front Neurol. 2020 Oct 15;11:576729. doi: 10.3389/fneur.2020.576729. eCollection 2020.

  PMID: 33178118 BACKGROUND

• Medved V, Medved S, Kovac I. Critical Appraisal of Surface Electromyography (sEMG) as a Taught Subject and Clinical Tool in Medicine and Kinesiology. Front Neurol. 2020 Oct 26;11:560363. doi: 10.3389/fneur.2020.560363. eCollection 2020.

  PMID: 33192993 BACKGROUND

MeSH Terms

Conditions

Musculoskeletal Diseases

Interventions

Electromyography

Intervention Hierarchy (Ancestors)

Electrodiagnosis; Diagnostic Techniques and Procedures; Diagnosis; Myography

Study Officials

• Cristina Lirio-Romero, PhD

  University of Castilla-La Mancha

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: observational
• Observational Model: OTHER
• Time Perspective: CROSS SECTIONAL
• Target Duration: 2 Days
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Principal Investigator, PhD

Study Record Dates

• First Submitted: January 9, 2021
• First Posted: January 12, 2021
• Study Start: December 1, 2015
• Primary Completion: January 1, 2019
• Study Completion: March 1, 2019
• Last Updated: August 11, 2021

Record last verified: 2021-08

Data Sharing

• IPD Sharing: Will not share