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Eight-week resistance training with vitamin D supplementation in postmenopausal women: Effects on skeletal muscle
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Abbas Saremi *   , Nader Shavandi , Hajar Vafapour |
| Assistant Professor, Department of Sport Sciences, Arak University, Arak, Iran , a-saremi@araku.ac.ir |
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Abstract: (7471 Views) |
| Background and Aim: Vitamin D has been shown to play a role in the development and preservation of muscle mass and function, which may enhance the benefits of training. The purpose of this study was to determine the effects of 8 weeks of resistance training with and without vitamin D supplementation on body composition in sedentary postmenopausal women. Materials and Methods: In this experimental study with pretest – posttest design, 45 elderly women (aged 56.7±3.4 y) were randomly assigned to resistance training only (RG), vitamin D supplementation (50000IU/w) plus resistance training (VR) or non-exercising control (CG) groups. Resistance training program was performed 50-60 min/d, 3 d/w, for 2 months. The non-exercise control group was asked to maintain their usual physical activities during the 2-month study period. Serum levels of insulin-like growth factor-I and 25-hydroxyvitamin D, body composition and muscle function were assessed before and after the training period. Results: Vitamin D supplementation increased serum 25-hydroxyvitamin D levels significantly (p<0.05). Resistance training caused significant increase in serum levels of insulin-like growth factor-I, muscle mass and muscle strength (p<0.05). Vitamin D supplementation in conjunction with resistance training led to greater increases in serum levels of insulin-like growth factor-I, muscle mass and muscle strength (p<0.05). Conclusion: These results suggest that resistance training is safe and effective for increasing muscle mass and strength in older adults and that a combination of vitamin D can enhance some of the beneficial effects of training over a two-month period. |
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| Keywords: Menopause, Muscle Strength, Resistance Training, Vitamin D |
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Full-Text [PDF 337 kb]
(2634 Downloads)
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Type of Study: Original |
Subject:
Medicine
Received: 2017 | Accepted: 2017 | Published: 2017
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