MUSCLE ARCHITECTURE AND STRENGTH: ADAPTATIONS TO SHORT- TERM RESISTANCE TRAINING IN OLDER ADULTS

    Authors

    T. C. Scanlon; M. S. Fragala; J. R. Stout; N. S. Emerson; K. S. Beyer; L. P. Oliveira;J. R. Hoffman

    Comments

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    Abbreviated Journal Title

    Muscle Nerve

    Keywords

    echo intensity; exercise; muscle quality; sarcopenia; ultrasonography; HUMAN SKELETAL-MUSCLE; MEN; WOMEN; HYPERTROPHY; SARCOPENIA; PERFORMANCE; ULTRASOUND; EXERCISE; FLEXORS; HUMANS; Clinical Neurology; Neurosciences

    Abstract

    Introduction: Muscle morphology and architecture changes in response to 6 weeks of progressive resistance training were examined in healthy older adults. Methods: In this randomized, controlled design, muscle strength, quality, and architecture were evaluated with knee extension, DEXA, and ultrasound, respectively, in 25 older adults. Results: Resistance training resulted in significant increases in strength and muscle quality of 32% and 31%, respectively. Cross-sectional area of the vastus lateralis increased by 7.4% (p0.05). Physiological cross-sectional area (PCSA) of the thigh, a composite measure of muscle architecture, was related significantly to strength (r=0.57; p0.01) and demonstrated a significant interaction after training (p0.05). Change in PCSA of the vastus lateralis was associated with change in strength independent of any other measure. Conclusions: Six weeks of resistance training was effective at increasing strength, muscle quality, and muscle morphology in older adult men and women. Muscle Nerve 49:584-592, 2014

    Journal Title

    Muscle & Nerve

    Volume

    49

    Issue/Number

    4

    Publication Date

    1-1-2014

    Document Type

    Article

    Language

    English

    First Page

    584

    Last Page

    592

    WOS Identifier

    WOS:000333193100019

    ISSN

    0148-639X

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