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J Am Geriatr Soc. 2001 Nov;49(11):1428-33.

Muscle size responses to strength training in young and older men and women.

Author information

1
Department of Kinesiology, University of Maryland, College Park 20742, USA.

Abstract

OBJECTIVES:

To examine the possible influences of age and gender on muscle volume responses to strength training (ST).

DESIGN:

Prospective intervention study.

SETTING:

University of Maryland Exercise Science and Wellness Research Laboratories.

PARTICIPANTS:

Eight young men (age 20-30 years), six young women (age 20-30 years), nine older men (age 65-75 years), and ten older women (age 65-75 years).

INTERVENTION:

A 6-month whole-body ST program that exercised all major muscle groups of the upper and lower body 3 days/week.

MEASUREMENTS:

Thigh and quadriceps muscle volumes and mid-thigh muscle cross-sectional area (CSA) were assessed by magnetic resonance imaging before and after the ST program.

RESULTS:

Thigh and quadriceps muscle volume increased significantly in all age and gender groups as a result of ST (P < .001), with no significant differences between the groups. Modest correlations were observed between both the change in quadriceps versus the change in total thigh muscle volume (r = 0.65; P < .001) and the change in thigh muscle volume versus the change in mid-thigh CSA (r = 0.76, P < .001).

CONCLUSIONS:

The results indicate that neither age nor gender affects muscle volume response to whole-body ST. Muscle volume, rather than muscle CSA, is recommended for studying muscle mass responses to ST.

PMID:
11890579
[Indexed for MEDLINE]

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