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    You are at:Home»Physiology»Lactate threshold training

    Lactate threshold training

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    By Andrzej Sagalara on September 2, 2013 Physiology

    Training at lactate threshold is usually performed at the intensity (referred to as the running velocity or heart rate at the intensity corresponding to the initial increase of blood lactate [La-] above resting level (usually of about 0,5 mmol/l). Lactate threshold shift toward a higher-intensity (i.e. higher running speed) indicates an increase of aerobic capacity level of an athlete and an increase of exercise tolerance.

    This means that the athlete is able to continue the effort with higher intensity (or higher heart rate without the increase and accumulation of both lactate concentration [La-] and hydrogen ions [H+] (causing a lowering of pH).

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    In addition, the shift of lactate threshold affects the economy of effort through more economical use of muscle energy resources (especially muscle glycogen) during the entire duration of the effort.

    Lactate curve shift toward higher exercise intensity

    [An example of right shift of lactate threshold curve vs speed after endurance training]

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    The
    observed phenomenon may be the result of growth in the number and size of the mitochondria and greater activity of key oxidative enzymes resulting in an increase of ATP resynthesis capacity from aerobic sources. In addition, the lactate threshold shift can also be caused by a greater ability to transport (remove) lactate out of muscle cells.

    Periodic monitoring of adaptive changes that occur in athlete’s body and are caused by the training (such as the analysis of “lactate curve” shift) allows to monitor the effectiveness of the training and the current level of aerobic fitness.

    Based on:
    Whyte G., (editor). The Physiology of Training. Advances in Sport and Exercise Science Series. Churchill Livingstone Elsevier, 2006.

    Lactate threshold training

    Lactate threshold training

    Lactate threshold training

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