The relationship between second-to-fourth digit ratio (2D:4D), muscle strength and body composition to bone mineral density in young women

IF 0.9 4区医学 Q4 REHABILITATION

Kinesiology Pub Date : 2019-11-15 DOI:10.26582/k.51.2.8

H. Arazi, Ehsan Eghbali

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引用次数: 0

Abstract

2D:4D ratio is determined by balance between androgens and estrogens. Low level estrogen reduces bone mineral density (BMD) and incurs negative changes to bone microarchitecture, increasing the risk of osteoporosis and, as a consequence, fracture risk in women. The purpose of this study was to investigate the relationship between 2D:4D, muscle strength and body composition to BMD in young women. One hundred twenty-seven young women (age range 24-36 years) voluntarily participated in this study. Lengths of the second (index) and fourth (ring) fingers, upper and lower body strength and body composition (body mass index, BMI; waist to hip ratio, WHR) and body fat percentage were estimated. Also, blood levels of calcium and 25-hydroxyvitamin D (25OHD) were evaluated and dual-energy X-ray absorptiometry device was used to measure BMD in the lumbar spine (LS) and femoral neck (FN). The results showed that digit ratios, upper body and lower body muscle strength, BMI and fat percentage had a positive relationship with LS and FN BMD (LS BMD: r=.47, r=.56, r=.46, r=.34, r=.28, p≤.001, respectively; FN BMD: r=.34, r=.49, r=.51, r=.45, r=.27, p≤.001, respectively). In addition, there was no significant relationship between WHR and BMD of LS and FN (p˃.05). Multiple linear regression analysis showed the upper body strength was a stronger determinant of LS BMD and the lower body strength was a stronger determinant of FN BMD. Based on the results, the researchers concluded that upper and lower body strength, 2D:4D ratios and BMI were important determinants of young women’s BMD. Also, it seemed that some of these factors may be able to help predicting the osteoporosis potential in young women

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年轻女性第二到第四指比例(2D:4D)、肌肉力量和身体组成与骨密度的关系

2D:4D比例由雄激素和雌激素之间的平衡决定。低水平的雌激素会降低骨密度（BMD），并导致骨微结构的负面变化，增加骨质疏松症的风险，从而增加女性骨折的风险。本研究的目的是研究年轻女性的2D:4D、肌肉力量和身体成分与BMD之间的关系。127名年轻女性（年龄24-36岁）自愿参与了这项研究。估计了第二（食指）和第四（无名指）的长度、上半身和下半身的力量和身体成分（体重指数、BMI；腰臀比、WHR）以及体脂百分比。此外，还评估了血液中钙和25-羟基维生素D（25OHD）的水平，并使用双能X射线吸收仪测量腰椎（LS）和股骨颈（FN）的BMD。结果显示，手指比例、上下半身肌肉力量、BMI和脂肪百分比与LS和FN BMD呈正相关（LS BMD:r=.47，r=.56，r=.46，r=.34，r=.28，p≤.001；FN BMD:r=.34、r=.49，r=.51，r=.45，r=.27，p≤0.001）。此外，WHR与LS和FN的BMD之间没有显著关系（p＜0.05）。多元线性回归分析表明，上身力量是LS BMD的较强决定因素，而下身力量是FN BMD的较弱决定因素。根据研究结果，研究人员得出结论，上下半身力量、2D:4D比率和BMI是年轻女性BMD的重要决定因素。此外，这些因素中的一些似乎有助于预测年轻女性骨质疏松的可能性

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来源期刊

Kinesiology REHABILITATION-SPORT SCIENCES

CiteScore

1.90

自引率

8.30%

发文量

审稿时长

>12 weeks

期刊介绍： Kinesiology – International Journal of Fundamental and Applied Kinesiology (print ISSN 1331- 1441, online ISSN 1848-638X) publishes twice a year scientific papers and other written material from kinesiology (a scientific discipline which investigates art and science of human movement; in the meaning and scope close to the idiom “sport sciences”) and other adjacent human sciences focused on sport and exercise, primarily from anthropology (biological and cultural alike), medicine, sociology, psychology, natural sciences and mathematics applied to sport in its broadest sense, history, and others. Contributions of high scientific interest, including also results of theoretical analyses and their practical application in physical education, sport, physical recreation and kinesitherapy, are accepted for publication. The following sections define the scope of the journal: Sport and sports activities, Physical education, Recreation/leisure, Kinesiological anthropology, Training methods, Biology of sport and exercise, Sports medicine and physiology of sport, Biomechanics, History of sport and Book reviews with news.