Vitamin D supplementation does not enhance resistance training-induced gains in muscle strength and lean body mass in vitamin D deficient young men.

Autor: Savolainen L; Institute of Sport Sciences and Physiotherapy, University of Tartu, 18 Ülikooli St, 50090, Tartu, Estonia., Timpmann S; Institute of Sport Sciences and Physiotherapy, University of Tartu, 18 Ülikooli St, 50090, Tartu, Estonia., Mooses M; Institute of Sport Sciences and Physiotherapy, University of Tartu, 18 Ülikooli St, 50090, Tartu, Estonia., Mäestu E; Institute of Sport Sciences and Physiotherapy, University of Tartu, 18 Ülikooli St, 50090, Tartu, Estonia., Medijainen L; Institute of Sport Sciences and Physiotherapy, University of Tartu, 18 Ülikooli St, 50090, Tartu, Estonia., Tõnutare L; Institute of Sport Sciences and Physiotherapy, University of Tartu, 18 Ülikooli St, 50090, Tartu, Estonia., Ross F; Institute of Sport Sciences and Physiotherapy, University of Tartu, 18 Ülikooli St, 50090, Tartu, Estonia., Lellsaar M; Institute of Sport Sciences and Physiotherapy, University of Tartu, 18 Ülikooli St, 50090, Tartu, Estonia., Unt E; Department of Cardiology, Institute of Clinical Medicine, University of Tartu, Tartu, Estonia.; Department of Sports Medicine and Rehabilitation, Institute of Clinical Medicine, University of Tartu, Tartu, Estonia.; Sports Medicine and Rehabilitation Clinic, Tartu University Hospital, Tartu, Estonia., Ööpik V; Institute of Sport Sciences and Physiotherapy, University of Tartu, 18 Ülikooli St, 50090, Tartu, Estonia. vahur.oopik@ut.ee.
Jazyk: angličtina
Zdroj: European journal of applied physiology [Eur J Appl Physiol] 2021 Jul; Vol. 121 (7), pp. 2077-2090. Date of Electronic Publication: 2021 Apr 05.
DOI: 10.1007/s00421-021-04674-9
Abstrakt: Purpose: Vitamin D (Vit-D) supplementation has been shown to increased muscle strength in young adults. It remains unclear if Vit-D supplementation enhances the efficacy of resistance training (RT). This study tested the hypothesis that Vit-D supplementation would enhance the RT-induced increases in muscle strength and lean body mass (LBM) in Vit-D deficient young men.
Methods: Thirty-nine men (baseline serum 25(OH)D < 50 nmol L ‒1 ) were quasi-randomly assigned to one of the two groups that performed a 12-week supervised RT program concomitant with either Vit-D (8000 IU daily; VD) or placebo (PLC) supplementation.
Results: During 12-week RT, energy and nutrient (except Vit-D) intake and training loads did not differ in the two groups. Serum 25(OH)D levels increased from 36.3 ± 9.2 to 142.4 ± 21.9 nmol L ‒1 (P < 0.05) in VD group and remained unchanged between 36.3 ± 8.9 and 29.4 ± 6.6 nmol L ‒1 (P > 0.05) in PLC group. Muscle strength (1-repetition maximum) increased (P < 0.05) to an equal extent in the two groups in 5 exercises performed on RT equipment, whereas strength gains in chest press and seated row were greater (P < 0.05) in PLC compared to VD group. Total and regional LBM (measured by DXA scan) increased (P < 0.05) equally in the two groups. Android fat mass decreased (P < 0.05) in VD group only.
Conclusion: Vit-D supplementation does not enhance the efficacy of RT in terms of muscle strength and LBM gains in Vit-D deficient young healthy men.
Databáze: MEDLINE
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