Arazi Hamid, Eghbali Ehsan
Department of Exercise Physiology, Faculty of Sport Sciences, University of Guilan, Rasht, Islamic Republic of Iran,
Int J Womens Health. 2019 Jan 23;11:57-64. doi: 10.2147/IJWH.S188914. eCollection 2019.
Vitamin D is a potent secosteroid hormone that provides many health benefits. The ubiquitous nature of vitamin D receptor (VDR) suggests widespread effect.
The purpose of this study was to investigate the relationship between 25-hydroxyvitamin D (25OHD) levels and muscle strength, maximal oxygen consumption (VOmax), and body mass index (BMI) in Iranian young and middle adulthood women.
A cross-sectional descriptive study was conducted in 182 healthy Iranian women within the age range of 26-60 years. Body weight and height were measured, and BMI was calculated. VOmax was determined by the Rockport test. Muscle strength was determined by the chest press, leg press, and hand grip test. Also, circulating levels of 25OHD were evaluated.
Results showed a significant relationship between 25OHD levels and BMI, VOmax, and muscle strength (chest press, leg press, hand grip dominant hand [HGDH], and hand grip nondominant hand [HGNDH]) in young and middle adulthood women (BMI in young and middle adulthood: r=-0.48, <0.001 and r=-0.27, =0.01, respectively; VOmax in young and middle adulthood women: r=0.69, <0.001 and r=0.57, <0.001, respectively; chest press, leg press, HGDH, and HGNDH in young adulthood: r=0.58, r=0.59, r=0.65, and r=0.42, respectively, <0.001; and in middle adulthood: r=0.73, r=0.34, r=0.66, and r=0.55, respectively, ≤0.001). Multiple linear regression analysis showed that higher levels of VOmax, HGDH, and chest press predicted higher 25OHD levels in the young adulthood women (R=0.75; β=0.39, β=0.35, and β=0.30, respectively; <0.001). Moreover, VOmax and HGDH were the strongest predictor of 25OHD levels in the middle adulthood women (R=0.71; β=0.35, β=0.40, respectively; <0.001).
Based on the results, it could be concluded that VOmax and strength are useful indirect marker for 25OHD levels in the young and middle adulthood women. It also seems that VOmax and HGDH strength had stronger associations with 25OHD levels in the young adulthood women, and chest press and HGDH had stronger associations with 25OHD levels in the middle adulthood women.
维生素D是一种强效的甾醇类激素，对健康有诸多益处。维生素D受体（VDR）的广泛存在表明其具有广泛的作用。
本研究旨在调查伊朗年轻及中年成年女性中25-羟基维生素D（25OHD）水平与肌肉力量、最大摄氧量（VOmax）和体重指数（BMI）之间的关系。
对182名年龄在26至60岁之间的健康伊朗女性进行了一项横断面描述性研究。测量了体重和身高，并计算了BMI。通过罗克波特测试确定VOmax。通过卧推、腿举和握力测试确定肌肉力量。此外，还评估了25OHD的循环水平。
结果显示，年轻及中年成年女性的25OHD水平与BMI、VOmax和肌肉力量（卧推、腿举、优势手握力[HGDH]和非优势手握力[HGNDH]）之间存在显著关系（年轻及中年成年女性的BMI：r=-0.48，<0.001；r=-0.27，=0.01；年轻及中年成年女性的VOmax：r=0.69，<0.001；r=0.57，<0.001；年轻成年女性的卧推、腿举、HGDH和HGNDH：r分别为0.58、0.59、0.65和0.42，<0.001；中年成年女性：r分别为0.73、0.34、0.66和0.55，≤0.001）。多元线性回归分析表明，年轻成年女性中较高的VOmax、HGDH和卧推水平预示着较高的25OHD水平（R=0.75；β分别为0.39、0.35和0.30；<0.001）。此外，VOmax和HGDH是中年成年女性25OHD水平的最强预测指标（R=0.71；β分别为0.35、0.40；<0.001）。
基于研究结果，可以得出结论，VOmax和力量是年轻及中年成年女性25OHD水平的有用间接指标。似乎VOmax和HGDH力量在年轻成年女性中与25OHD水平的关联更强，而卧推和HGDH在中年成年女性中与25OHD水平的关联更强。
