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Effects of vitamin D supplementation during exercise training on strength and body composition
Author(s) -
Carrillo Andres E,
Flynn Michael G,
Pinkston Catherine,
Markofski Melissa M,
Jiang Yan,
Donkin Shawn S,
Teegarden Dorothy
Publication year - 2010
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fasebj.24.1_supplement.917.20
Subject(s) - composition (language) , vitamin , strength training , training (meteorology) , vitamin d and neurology , food science , medicine , chemistry , physical therapy , endocrinology , physics , philosophy , linguistics , meteorology
The purpose of this study was to examine the effects of vitamin D supplementation (4,000 IU/day) during an exercise training intervention on body composition, muscular strength, and power. Overweight (BMI: 31.3 ± 3.2 kg/m 2 ) adults (26.1 ± 4.7 years, n=23) were recruited during winter months and randomized into a vitamin D (Vit D, n = 10) or placebo (PL, n = 13) group. Both groups completed 12 wks (3 d/wk) of resistance exercise, and were asked to use the provided sunscreen daily. Vitamin D status (serum 25 hydroxyvitamin D (25OHD)) and body composition (DXA) were assessed at 0 and 12 wks, and muscular strength and power at 0, 4, 8, and 12 wks using Keiser pneumatic resistance equipment. Post 25OHD was increased in VitD (33.4 ± 7.2 ng/mL) compared to baseline (20.8 ± 8.3 ng/mL, p<0.05) and was significantly elevated compared to post PL (23.5 ± 6.0 ng/mL, p<.05). Power was higher, compared to baseline, in Vit D only at week 4 ( Fig 1.). Post muscular strength and lean mass were increased in both groups (p<0.05) with no between group differences. Vitamin D supplementation during exercise training induced an early increase in muscular power, but did not alter other indices of muscle function.