Clinical trial NCT02974452: Age-related Changes of Shoulder Muscles
Official title: Age-related Changes in Activation Patterns of Shoulder Muscles
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Electromyography
Lead sponsor: University of Alcala
Sponsor class: OTHER
First posted: 2016-11-28
Enrollment: 60
Sex: ALL
Minimum age (years): 20
Maximum age (years): 90
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Observational model: ECOLOGIC_OR_COMMUNITY
Time perspective: CROSS_SECTIONAL
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.

Brief summary: A cross-sectional descriptive study, in which the surface electromyographic activity of five shoulder muscles was compared in three populations: older adults, middle-aged adults and young 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.

Detailed description: The purpose of the present work was to assess neuromotor abnormalities in aging shoulder. Twenty young adults (20-42), 20 middle-aged adults (43-67) and 20older adults (\>68) were recruited. A comparative electromyography (EMG) study was performed on the upper and lower trapezius, middle deltoid, infraspinatus and serratus anterior. The EMG measurement (root mean square (RMS)) and onset time of isometric contractions were analyzed. Body mass index and strength were also tested.

Eligibility criteria: Inclusion Criteria:

* Healthy subjects with no previously manifested symptoms in the shoulder joint and/or the neck during the past year,

Exclusion Criteria:

* moderate or severe cognitive impairment, rheumatologic diseases, massive osteoarthritis, tumors, shoulder joint instability, circulatory disorders (hemophilia clotting problems) and dermatological problems exacerbated by contact with skin

Primary outcomes:
measure: The mean Root Mean Square (RMS) value
timeFrame: 30 minutes
measure: onset latency
timeFrame: 30 minutes
Secondary outcomes:
measure: maximal isometric voluntary contraction
timeFrame: 5 minutes
measure: body mass index
timeFrame: 5 minutes
Other outcomes:
Locations:
Study officials:
affiliation: University of Alcalá
name: Maria Tommes Lacomba, PhD
role: STUDY_DIRECTOR
References:
citation: Lirio Romero C, Torres Lacomba M, Castilla Montoro Y, Prieto Merino D, Pacheco da Costa S, Velasco Marchante MJ, Bodes Pardo G. Mobilization With Movement for Shoulder Dysfunction in Older Adults: A Pilot Trial. J Chiropr Med. 2015 Dec;14(4):249-58. doi: 10.1016/j.jcm.2015.03.001. Epub 2015 Nov 24.
citation: Phadke V, Camargo P, Ludewig P. Scapular and rotator cuff muscle activity during arm elevation: A review of normal function and alterations with shoulder impingement. Rev Bras Fisioter. 2009 Feb 1;13(1):1-9. doi: 10.1590/S1413-35552009005000012.
citation: Hermens HJ, Freriks B, Disselhorst-Klug C, Rau G. Development of recommendations for SEMG sensors and sensor placement procedures. J Electromyogr Kinesiol. 2000 Oct;10(5):361-74. doi: 10.1016/s1050-6411(00)00027-4.