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本研究的目的是调查在渐增负荷运动中，血浆胺和血浆乳酸浓度是否受细胞外液碱中毒的影响，以及乳酸阈（ＬＴ）和通气闲（ＶＴ）也是否受其影响；８名受试者采用功率自行车进行渐增负荷运动，直至力竭。同时测定吸氧量（ＶＯ２）、通气量（ＶＥ）、血浆乳酸、血浆胺、血液ｐＨ、ＨＣＯ３－及心率（ＨＲ）。受试者在两种条件下进行实验：（１）每公斤体重摄取０．３ａＮａＨＣＯｄ３（碱中毒组：Ａ）；（２）摄取安慰胶囊组（Ｐ）。运动前后的血液ｐＨ和ＨＣＯ３－均有显著性差异。Ａ组与Ｐ组相比较，运动负荷时间及ＶＯ２ｍａｘ无显著性差异（ｐ＞０．０５）。Ｐ组ＬＴ时的ＶＯ２与ＶＴ相比较，无显著性差异（ｐ＞０．０５），但Ａ组ＬＴ时的ＷＯ２与ＶＴ相比较，却有显著性差异（ｐ＜０．０５）。Ａ组和Ｐ组ＶＴ时的ＶＯ２相比较，无显著性差异（ｐ＞０．０５），但两组ＬＴ时的ＶＯ２相比较，有显著性差异（ｐ＜０．０５。Ａ组ＬＴ明显低于Ｐ组，反映了在运动中大量乳酸由肌肉进入血液。Ａ组和Ｐ组的血浆胺阈（ＡＭＴ）相比较，无显著性差异（ｐ＞０．０５），研究证明细胞外碱中毒影响ＬＴ而不影响ＡＭＴ，使ＬＴ和ＶＴ分离，从而影响ＬＴ的确定。
The purpose of this study was to investigate whether plasma amine and plasma lactate concentrations are affected by extracellular caustic alkalosis and whether lactate threshold (LT) and ventilatory relaxation (VT) are affected by progressive load exercise. Eight subjects The test subjects used power bicycles to carry out incremental load exercises until exhausted. VO2, VE, plasma lactate, plasma amines, blood pH, HCO3- and heart rate (HR) were measured simultaneously. Subjects were tested under two conditions: (1) 0.3aNaHCOd3 per kg of body weight (alkalosis group: A); (2) Intramuscular (P) group. Before and after exercise blood pH and HCO3-were significant differences. There was no significant difference in exercise load time and VO2max between group A and group P (p> 0.05). There was no significant difference between VO2 and VT in group P (p> 0.05), but there was a significant difference (p <0.05) between group WO and VT in LT. There was no significant difference in VO2 between group A and group VT (p> 0.05), but there was significant difference between group VO2 at LT (p <0.05), group A In group P, a significant amount of lactic acid was mobilized from the muscle into the blood during exercise, and there was no significant difference in plasma amine threshold (AMT) between group A and group P (p> 0.05) LT does not affect the AMT, LT and VT separation, thus affecting the LT to determine.