Muscle size, strength, power, and echo intensity, but not specific tension, are affected by age in physically active adults

Mitchel A. Magrini; Ryan J. Colquhoun; Alejandra Barrera-Curiel; Ryan M. Thiele; Jason M. DeFreitas; Doug B. Smith; Nathaniel D. M. Jenkins

doi:10.3233/IES-172194

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Muscle size, strength, power, and echo intensity, but not specific tension, are affected by age in physically active adults

Journal article

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Muscle size, strength, power, and echo intensity, but not specific tension, are affected by age in physically active adults

Mitchel A. Magrini, Ryan J. Colquhoun, Alejandra Barrera-Curiel, Ryan M. Thiele, Jason M. DeFreitas, Doug B. Smith and Nathaniel D. M. Jenkins

Isokinetics and exercise science, Vol.26(2), pp.95-103

01/01/2018

DOI: 10.3233/IES-172194

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Abstract

OBJECTIVE: We examined the relationships among and differences between muscle size and strength, specific tension (MQ(ST)), echo intensity (MQ(EI)), and functional performance in physically active younger and older women. METHODS: Measurements included maximal voluntary isometric knee extension contractions (MVICs), maximal velocity sitto-stand (STS) movements, and muscle cross sectional area (mCSA), MQ(S)(T), and MQ(EI) of the rectus femoris (RF). RESULTS: There were no differences in MQ(ST) (p = 0.96) or physical activity levels (p = 0.29). MQ(ST) and MQ(EI) were not related in the younger women, but were related in the older women (r = 0.50). MVIC was related to mCSA (r = 0.75) in the older women, but was not significantly related to MQ(ST) or MQ(EI) in either age group. DISCUSSION: Physical activity may maintain MQ(ST) in aging. We suggest that studies examining changes in skeletal muscle with aging utilize both traditionally calculated muscle quality (specific tension) and ultrasound EI.

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Title: Subtitle: Muscle size, strength, power, and echo intensity, but not specific tension, are affected by age in physically active adults
Creators: Mitchel A. Magrini - Oklahoma State University
Ryan J. Colquhoun - Oklahoma State University
Alejandra Barrera-Curiel - Oklahoma State University
Ryan M. Thiele - Kansas State University
Jason M. DeFreitas - Oklahoma State University
Doug B. Smith - Oklahoma State University
Nathaniel D. M. Jenkins - Oklahoma State University
Resource Type: Journal article
Publication Details: Isokinetics and exercise science, Vol.26(2), pp.95-103
DOI: 10.3233/IES-172194
ISSN: 0959-3020
eISSN: 1878-5913
Publisher: Ios Press
Number of pages: 9
Grant note: Heart of the Community Wellness Grant (Stillwater Medical Center, Stillwater, OK, USA)
Language: English
Date published: 01/01/2018
Academic Unit: Center for Social Science Innovation; Injury Prevention Research Center; Health, Sport, and Human Physiology
Record Identifier: 9984259655902771

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