重新探讨通气和心血管对全身代谢率的预测作用。

Revisiting ventilatory and cardiovascular predictions of whole-body metabolic rate.

机构信息

From the Centre for Human and Applied Physiology, School of Medicine, University of Wollongong, Wollongong, New South Wales, Australia.

出版信息

J Occup Environ Med. 2014 Feb;56(2):214-23. doi: 10.1097/JOM.0000000000000086.

DOI:10.1097/JOM.0000000000000086

PMID:24451619

Abstract

OBJECTIVE

The influence of variations in exercise mode, thermal state, and load carriage on cardiac and ventilatory predictors of metabolic rate were investigated.

METHODS

Fifteen males were studied at rest and during whole-, upper-, and lower-body exercise (unloaded and loaded) under thermoneutral and hot conditions.

RESULTS

Ventilatory predictions were superior in thermoneutral (residual mean square error range: 0.04 to 0.17 L·min(-1) vs 0.21 to 0.36 L·min(-1)) and hot conditions (0.03 to 0.07 L·min(-1) vs 0.21 to 0.24 L·min(-1)). Predictions derived from whole- or lower-body exercise, and unloaded or loaded exercise could be interchanged without significant error. Nevertheless, a mode-specific prediction was required for upper-body work, and mild hyperthermia significantly reduced the precision of cardiac predictions.

CONCLUSION

Ventilatory predictions were more precise, but errors from heart-rate predictions could be minimized by using thermal-state and exercise mode-specific predictions.

摘要

目的

研究运动方式、热状态和负重对代谢率的心脏和呼吸预测因子的影响。

方法

在热中性和热环境下，15 名男性在休息和全身、上半身和下半身运动（未负重和负重）时进行研究。

结果

在热中性（残差均方误差范围：0.04 至 0.17 L·min(-1) 与 0.21 至 0.36 L·min(-1)) 和热环境（0.03 至 0.07 L·min(-1) 与 0.21 至 0.24 L·min(-1)) 下，呼吸预测更为准确。来自全身或下半身运动、未负重或负重运动的预测可以互换而不会产生显著误差。然而，对于上半身运动需要特定模式的预测，并且轻度体温升高显著降低了心脏预测的精度。