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Does Vitamin D add to the effect of 12‐weeks resistance training? A randomized controlled trial on healthy untrained young and elderly men
Author(s) -
Agergaard Jakob,
Trøstrup Jeanette,
Uth Jacob,
Vestergård Jonas,
Boesen Anders,
Schjerling Peter,
Langberg Henning
Publication year - 2013
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.27.1_supplement.713.7
Subject(s) - medicine , isometric exercise , placebo , vitamin d and neurology , skeletal muscle , resistance training , muscle strength , placebo group , endocrinology , physical therapy , physiology , pathology , alternative medicine
Vitamin D (VitD) intake has shown to improve skeletal muscle function in VitD insufficient frail elderly. However, if VitD intake may improve the effect of resistance training (RT) in healthy individuals is unknown. Material and Methods 20 healthy untrained young (age 22.8 ± 2.0) and 20 elderly (age 67.3 ± 4.3) men were randomized to 16 week daily supplementary intake of either 48 μg VitD + calcium (VitD‐group) or calcium (Placebo‐group), and underwent progressive RT of quadriceps muscle for the last 12 weeks. Pre and post 12 weeks RT cross sectional area (CSA), and isometric strength of quadriceps muscle was measured. Muscle fiber type morphology was analyzed from muscle biopsies taken pre and post training. Results VitD intake increased serum 25(OH)D levels in young and elderly to an extent that were different from the respective placebo group. RT increased CSA and isometric strength and improved skeletal muscle morphology of quadriceps muscle. However, no additive effect was seen from VitD intake in young or elderly. Conclusion 12 weeks of RT altered CSA, strength and fiber type morphology of quadriceps muscle as expected. However, VitD intake did not add to the positive effect of RT.