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J Appl Physiol 90: 2070-2074, 2001;
8750-7587/01 $5.00
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Vol. 90, Issue 6, 2070-2074, June 2001

Muscle-specific atrophy of the quadriceps femoris with aging

T. A. Trappe1, D. M. Lindquist2, and J. A. Carrithers1

1 Nutrition, Metabolism, and Exercise Laboratory, Donald W. Reynolds Department of Geriatrics, and 2 Department of Radiology, University of Arkansas for Medical Sciences, Little Rock, Arkansas 72205

We examined the size of the four muscles of the quadriceps femoris in young and old men and women to assess whether the vastus lateralis is an appropriate surrogate for the quadriceps femoris in human studies of aging skeletal muscle. Ten young (24 ± 2 yr) and ten old (79 ± 7 yr) sedentary individuals underwent magnetic resonance imaging of the quadriceps femoris after 60 min of supine rest. Volume (cm3) and average cross-sectional area (CSA, cm2) of the rectus femoris (RF), vastus lateralis (VL), vastus intermedius (VI), vastus medialis (VM), and the total quadriceps femoris were decreased (P < 0.05) in older compared with younger women and men. However, percentage of the total quadriceps femoris taken up by each muscle was similar (P > 0.05) between young and old (RF: 10 ± 0.3 vs. 11 ± 0.4; VL: 33 ± 1 vs. 33 ± 1; VI: 31 ± 1 vs. 31 ± 0.4; VM: 26 ± 1 vs. 25 ± 1%). These results suggest that each of the four muscles of the quadriceps femoris atrophy similarly in aging men and women. Our data support the use of vastus lateralis tissue to represent the quadriceps femoris muscle in aging research.

magnetic resonance imaging; rectus femoris; vastus lateralis; vastus intermedius; vastus medialis


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