Effect of body build on weight-training-induced adaptations in body composition and muscular strength

L.M.L.A. van Etten, S. Callens, K.R. Westerterp

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Abstract

Effect of body build on weight-training-induced adaptations in body composition and muscular strength.

Van Etten LM, Verstappen FT, Westerterp KR.

Institute of Movement Sciences, University of Limburg, Maastricht, The Netherlands.

The aim of the present study was to investigate whether weight-training-induced adaptations in body composition and isokinetic strength differ as a function of body build. Body build of a subject was characterized as the extent to which a person's fat-free mass index (FFMI = fat-free mass.height-2;kg.m-2) differs from the regression of FFMI over fat mass index (FMI = fat mass.height-2;kg.m-2) as derived from a sedentary male population (N = 77). From this population two groups with either a slender (N = 10) or a solid (N = 11) body build were selected. For 12 wk the subjects performed a weight-training program twice a week. Training induced a significant (P < 0.05) increase in fat-free mass (FFM) in the solid group (1.6 kg, 2.3%) in contrast with the slender group, which showed no significant change in FFM. Both groups showed comparable decreases in fat mass (FM; slender: -1.7 kg, -10.8% versus solid: -2.4 kg, -11.3%) and increases in strength (on average 13.8%). In conclusion, the increase in FFM due to a weight-training program is modified by body build. This modification, however, is restricted to a larger increase in the solidly built group.
Original languageEnglish
Pages (from-to)515-521
JournalMedicine and Science in Sports and Exercise
Volume26
Issue number4
DOIs
Publication statusPublished - 1 Jan 1994

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