钙补充剂对男性自行车运动员骨密度的影响。

Effects of a calcium supplement on bone mineral density in male cyclists.

作者信息

Mathis S, Farley R S, Fuller D K, Jetton A E, Ishikawa S, Caputo J L

机构信息

Department of Kinesiology, University of Alabama in Huntsville, Huntsville, AL, USA -

出版信息

J Sports Med Phys Fitness. 2015 Sep;55(9):940-5.

PMID:26470637

Abstract

AIM

The purpose of this study was to maintain or improve bone density in male road cyclists through provision of calcium and vitamin D3 supplementation ingested before cycling.

METHODS

Participants were male cyclists (N=17), with a mean (±SD) age of 42.7 (9.4) years. Measurements of lumbar spine and hip areal bone mineral density (aBMD) were performed at the start and end of a cycling season. Cyclists were randomized into the calcium supplement (CAL) or the control group (CON) group based on lumbar spine T-scores. The CAL group was instructed to consume 1600 mg calcium and 1000 IU vitamin D3 prior to cycling for the 5-month period.

RESULTS

Femoral trochanter aBMD significantly decreased during the 5 month cycling season. There was no difference in aBMD between CAL and CON groups.

CONCLUSION

Negative effects of competitive cycling on aBMD in hip structures can be observed within 5 months. Calcium and vitamin D3 ingested prior to cycling does not ameliorate this effect. This proof of concept paper provides evidence that more work is needed to find mechanisms to protect cyclists from destructive bone loss in hip structures.

摘要

目的

本研究的目的是通过在骑行前摄入钙和维生素D3补充剂来维持或提高男性公路自行车运动员的骨密度。

方法

参与者为男性自行车运动员（N = 17），平均（±标准差）年龄为42.7（9.4）岁。在一个骑行赛季开始和结束时测量腰椎和髋部的骨矿物质密度（aBMD）。根据腰椎T值将自行车运动员随机分为钙补充剂（CAL）组或对照组（CON）。CAL组被要求在5个月的时间内，在骑行前摄入1600毫克钙和1000国际单位维生素D3。