+Gz力对战斗机飞行员骨矿物质密度的影响。

The effects of +Gz force on the bone mineral density of fighter pilots.

作者信息

Naumann F L, Bennell K L, Wark J D

机构信息

School of Biomedical and Sport Science, Edith Cowan University, Joondalup, Perth, Australia.

出版信息

Aviat Space Environ Med. 2001 Mar;72(3):177-81.

PMID:11277282

Abstract

HYPOTHESIS

Bone is a metabolically active tissue which responds to high strain loading. The purpose of this study was to examine the bone response to high +Gz force loading generated during high performance flying.

METHODS

The bone response to +Gz force loading was monitored in 10 high performance RAAF pilots and 10 gender-, age-, height-, weight-matched control subjects. The pilots were stationed at the RAAF base at Pearce, Western Australia, all completing the 1-yr flight training course. The pilots flew the Pilatus PC-9 aircraft, routinely sustaining between 2.0 and 6.0 +Gz. Bone mineral density (BMD) and bone mineral content (BMC) were measured at baseline and 12 mo, using the Hologic QDR 2000+ bone densitometer.

RESULTS

After controlling for change in total body weight and fat mass, the pilots experienced a significant increase in BMD and BMC for thoracic spine, pelvis, and total body, in the magnitude of 11.0%, 4.9%, and 3.7%, respectively. However, no significant changes in bone mineral were observed in the pilots lumbar spine, arms or legs. The control group experienced a significant decrease in pelvic BMC, with no other bone mineral changes observed at any site.

CONCLUSIONS

These findings suggest that site specific BMD is increased in response to high +Gz forces generated during high performance flying in a PC-9.

摘要

假设

骨骼是一种对高应变负荷有反应的代谢活跃组织。本研究的目的是检测骨骼对高性能飞行期间产生的高 +Gz 力负荷的反应。

方法

在 10 名澳大利亚皇家空军（RAAF）高性能飞行员和 10 名性别、年龄、身高、体重匹配的对照受试者中监测骨骼对 +Gz 力负荷的反应。这些飞行员驻扎在西澳大利亚州皮尔斯的 RAAF 基地，均完成了为期 1 年的飞行训练课程。飞行员驾驶皮拉图斯 PC - 9 飞机，常规承受 2.0 至 6.0 +Gz 的负荷。使用 Hologic QDR 2000+ 骨密度仪在基线和 12 个月时测量骨矿物质密度（BMD）和骨矿物质含量（BMC）。