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Disadvantages of Lactic Acid in Human Performance.

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Presentation on theme: "Disadvantages of Lactic Acid in Human Performance."— Presentation transcript:

1 Disadvantages of Lactic Acid in Human Performance

2 Lactate is produced as a result of ATP formation via non oxidative energy system – glycolysis Increased lactate concentrations in the blood have been observed, resulted in decreased athletic performance Increase abundance of H+ ions can change the pH level. Negative effects of lactic acid could be multi- factorial

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4 Increased levels of lactate and H+ ions could impair SR Ca 2+ release channels H+ could depress Ca 2+ activation of actin myofilaments H+ induces a reduction of the Ca 2+ reloading into the SR

5 Additional controversies: Difficulty in extrapolating the results to in vivo conditions – exercise performance in humans Studies based on isolated, non contracting muscle and skinned muscle fibers resulting in artificial non exercise related conditions Positive correlation between transport capacity and performance, suggesting that lactic acid accumulation is a disadvantage. Although high levels of lactic acid & low pH are not primary cause of fatigue, it appears to contribute to fatigue during intense exercise


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