EFFECT OF CIRCULATORY SYSTEM AND BUFFER SYSTEM ON BLOOD LACTATE DISAPPEARANCE IN RECOVERY EXERCISE

在恢复训练中，训练组(ET)的血乳酸消失率高于未训练组(UT)。首先，我们研究了循环系统对血乳酸消失的影响，即心输出量(Q)、每搏输出量(SV)和(a-v)O_2差(a-v O_2 diff)对其的影响。其次，我们研究了缓冲系统在ET和UT的血乳酸清除中的作用。首先，ET和UT的血乳酸消失率有显著差异(P&lt；0.05)。而Q、SV心率(HR)和(a-v)O_2不同。两组间未出现明显差异。两组在恢复运动时的VO2仅有较大差异，差异无统计学意义。VO_2由Q、SV HR和a-v O_2差分积分而成。通过各参数的综合差异，总结两组VO2的显著差异。我们发现过量的VO_2与乳酸消失率显著相关。其次，我们研究了恢复运动中血乳酸消失率与pH恢复的关系。结果表明，尽管恢复运动中乳酸的消失率相同，但ET的pH恢复比UT快。PH恢复到乳酸消失率，即缓冲能力，在HF组高于UT组。推测ET具有更强的由体向外排出二氧化碳的能力。结论：在恢复运动中，缓冲系统对血乳酸消失的影响比循环系统更大。

Edurance trained men (ET) have the superior blood lactate disappearance than untrained men (UT) do in recovery exercise. We start this study to clear the mechanism of lactate disappearance in ET.First, we in vestigated the effect of ciculatory system on blood lactate disappearance, that is, of cardiac output (Q), stroke volume (SV and (a-v) O_2 difference (a-v O_2 diff) on it. Second we studied how buffer system is contributed to blood lactate removal in HT and UT.First Rate of blood lactate disappearance was significantly different between ET and UT (P<0.05). However, Q,SV heart rate (HR) and (a-v) O_2 diff. did not occur significant difference between both groups. SV occurred a few much but not significant difference and there was only a large and significant difference between both groups in VO2 at recovery exercise. VO_2 is integrated by Q,SV HR and a-v O_2 diff.. The significant difference of VO_2 between both groups was summarized by the integrated difference of each parameter. We found excess VO_2 Was Significantly related to rate of lactate disappearance.Second, we studied the relationship of blood lactate disappearance to pH recovery during recovery exercise. It was shown that pH recovery was more rapid in ET than in UT despite of the same rate of lactate disappearance during recovery exercise. Rate of pH recovery to lactate disappearance, that is represented as buffering capacity was shown higher in HF than in UT We speculated that ET have a superior capacity of CO_2 expiration from body to outside.We conclued that buffer system influences to blood lactate disappearance stronger than circulatory system does during recovery exercise.