A SIMPLIFICATION OF THE STEWART EQUATION TO DETERMINE ACID-BASE STATUS IN EXERCISE

被引：0

作者：

Peinado, A. B. ^{[1
]}

Diaz, V ^{[1
,2
,3
]}

Benito, P. J. ^{[1
]}

Alvarez, M. ^{[2
,3
]}

Calderon, F. J. ^{[1
]}

机构：

[1] Univ Politecn Madrid, Fac Ciencias Actividad Fis & Deporte INEF, E-28040 Madrid, Spain

[2] Univ Zurich, Inst Fisiol Vet, CH-8006 Zurich, Switzerland

[3] Univ Zurich, Zurich Ctr Integrat Human Physiol ZIHP, CH-8006 Zurich, Switzerland

来源：

REVISTA INTERNACIONAL DE MEDICINA Y CIENCIAS DE LA ACTIVIDAD FISICA Y DEL DEPORTE | 2011年 / 11卷 / 41期

关键词：

acid-base equilibrium; constant load; hydrogen ion; lactate; strong ions; VENTILATORY THRESHOLD; MAXIMAL EXERCISE; SKELETAL-MUSCLE; LATE-GESTATION; GAS-EXCHANGE; VENOUS-BLOOD; BALANCE; PLASMA; EQUILIBRIA; CHEMISTRY;

D O I：

暂无

中图分类号：

G8 [体育];

学科分类号：

04 ; 0403 ;

摘要：

The aim of the present study was to simplify the Stewart equation and to test the validity of the proposed form. Twenty-four men performed a constant load exercise test for 30 min on a treadmill. Capillary blood samples were taken at rest, and again 10, 20 and 30 min into the test. Acid-base variables were measured using a blood-gas analyser and lactate levels were measured enzymatically. The [H(+)] was calculated using the Stewart equation: A[H(+)](4)+B[H(+)](3)+C[H(+)](2)+D[H(+)]+ E=0, and using a proposed, simplified version of this equation: A[H(+)](2)+B[H(+)]+C=0. The difference in the mean [H(+)] results obtained with the two equations was 0.004 nmol.L(-1). However, the difference between the means of the equation-derived results and the measured values was highly significant at > 8 nmol.L(-1) (p < 0.001). The proposed equation can be used to estimate [H(+)] instead of the full Stewart equation, although the values obtained are significantly different to those actually measured.

引用

页码：115 / 126

页数：12

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