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Muscle architecture and strength: Adaptations to short‐term resistance training in older adults
Author(s) -
Scanlon Tyler C.,
Fragala Maren S.,
Stout Jeffrey R.,
Emerson Nadia S.,
Beyer Kyle S.,
Oliveira Leonardo P.,
Hoffman Jay R.
Publication year - 2014
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.23969
Subject(s) - muscle architecture , resistance training , muscle strength , vastus lateralis muscle , strength training , physical medicine and rehabilitation , medicine , sarcopenia , physical therapy , skeletal muscle , anatomy
: 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% ( p ≤ 0.05). Physiological cross‐sectional area (PCSA) of the thigh, a composite measure of muscle architecture, was related significantly to strength ( r = 0.57; p ≤ 0.01) and demonstrated a significant interaction after training ( p ≤ 0.05). 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