Influence of buffering capacity on performance in continuous or intermittent endurance exercise

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If an individual does not possess a high capacity to buffer lactic acid and hydrogen lons accumulated during short-term (high intensity) exercise or relatively longer (medium intensity) continuous or intermittent exercise, a high level of work can not be achieved. Therefore, in this study we investigated the relationship between endurance performance during continuous or intermittent exercise and bicarbonate or non-bicarbonate buffering capacity. To do this we evaluated, 1) the reliability of excess- C0_2 as an indicator of bicarbonate buffering capacity (Experiment 1), 2) the -relationship between various types of endurance exercise performance and excess CO_2 as well as- carnosine concentration, which is an indicator of non-bicarbonate buffering capacity (Experiment 2), and 3) the effect of various types of training on bicarbonate or non-bicarbonate buffering capacity (Experiment 3).The results of Experiment 1 showed that excess CO_2 measured until the point of maximal oxygen uptake … More during incremental exercise (CO_2 excess), and also excess CO_2 measured as the difference in the amount of expired CO_2 and O_2 intake(CO_2-O_2dif) during and after continuous or intermittent exercise are accurate and reliable indicators of bicarbonate buffering capacity. The results of Experiment 2 showed that the bicarbonate buffering capacity indicators (CO_2 excess and CO_2-CO_2dif) , and also the non-bicarbonate buffering capacity indicator (carnosine concentration) are influencing factors on performance during short-term exercise (high intensity) or also relatively longer (medium intensity) continuous or intermittent exercise. The results of Experiment 3 showed that it is possible that CO_2excess, CO_2-O_2dlf and carnosine concentration may be improved by such methods as resistance training, sprint training, endurance training and hypoxic training.The aboved results showed that as well as improvements in ATP-PC, LA, andO_2 energy system capacity, an improved bicarbonate or non-bicarbonate buffering capacity is also a factor that should not be ignored in regard to improving performance in continuous or intermittent exercise. Less