Exp Clin Endocrinol Diabetes 2016; 124(08): 461-465
DOI: 10.1055/s-0042-103932
Article
© Georg Thieme Verlag KG Stuttgart · New York

Short-term Administration of Alphacalcidol is Associated with More Significant Improvement of Muscular Performance in Women with Vitamin D Deficiency Compared to Native Vitamin D

One Sentence Summary: Alphacalcidol increases muscle performance in vitamin D-deficient women more than cholecalciferol
C. Capatina
1   “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania
2   “C.I.Parhon” National Institute of Endocrinology and Metabolism, Bucharest, Romania
,
A. Caragheorgheopol
2   “C.I.Parhon” National Institute of Endocrinology and Metabolism, Bucharest, Romania
,
M. Berteanu*
1   “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania
3   Emergency Hospital Elias, Department Physical Medicine and Rehabilitation, Bucharest, Romania
,
C. Poiana*
1   “Carol Davila” University of Medicine and Pharmacy, Bucharest, Romania
2   “C.I.Parhon” National Institute of Endocrinology and Metabolism, Bucharest, Romania
› Author Affiliations
Further Information

Publication History

received 16 December 2015
first decision 16 February 2016

accepted 25 February 2016

Publication Date:
11 May 2016 (online)

Abstract

Introduction: Positive relationships between muscle function and vitamin D (VD) status, defined by serum 25-hydroxy VD (25OHD) levels have been reported and muscle strength is generally improved with VD supplementation in deficient individuals. The effects of active VD analogs have been less studied.

Aim: We aim to investigate the effect of short-term treatment with native VD (cholecalciferol) or alphacalcidol on the muscular function and physical performance in women with vitamin D deficiency.

Material and methods: We analysed 178 women with VD deficiency, defined as serum 25-hydroxyVD-25OHD concentration below 30 ng/ml. We recorded the grip-strength and the results of the chair-rise test (CRT) and timed-up-and-go test (TUG). We randomised the patients to receive cholecalciferol 1 000 IU daily or alphacalcidol 1 μg daily, for 6 months.

Results: The mean baseline 25OHD concentration was 14.47±6.57 ng/ml. After treatment the serum 25OHD level rose to 20.85±8.88 ng/ml, significantly higher in cases supplemented with cholecalciferol (22.7±8.32 ng/ml) compared to those treated with alphacalcidol (13.5±7.29 ng/ml, p=0.000). After treatment, significant improvements of TUG and CRT test results (− 6.48 and−5.05% compared to baseline, respectively, p=0.000) and gripstrength (7.85% compared to baseline, p=0.000) occurred. The benefit was more significant in cases treated with alphacalcidol for gripstrength (p=0.001), TUG (p=0.002), CRT (p=0.033). After treatment, the gripstrength increased significantly more in patients with severe baseline VD deficiency.

Conclusions: VD status improvement is associated with an increase in muscular performance in women with VD deficiency. Alphacalcidol exerts significantly better effects compared to cholecalciferol, and this can not be explained by a larger increase in serum 25OHD concentration.

* The authors had equal contributions.


 
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