Effect of endurance training on blood lactate clearance after maximal exercise

Abstract

The aim of this study was to measure serial changes in the rate of blood lactate clearance (gamma2) in response to sequential periods of training and detraining in four male triathletes aged 22-44 years. There were two major phases of training and taper, each lasting 4-5 weeks (training 1 = 5 weeks, taper 1 = 2 weeks, training 2 = 4 weeks and taper 2 = 2 weeks), in preparation for a triathlon competition. The training stimulus absorbed by each subject was carefully quantified from the duration and intensity of the training exercise. A serial weekly measure of each trainee's physical response to training was evaluated as the peak power, termed a 'criterion performance', developed by a subject during a 30 W x min(-1) ramp cycle ergometer test to exhaustion each week. During 30 min of recovery after this test, 13 samples of venous blood were drawn sequentially from a subject to measure the blood lactate recovery curve. The rate constant of blood lactate clearance was estimated by a non-linear least-squares regression technique. In addition, the concurrent time to peak lactate concentration and the peak lactate concentration were also estimated to help define changing lactate kinetics. The criterion performance generally declined throughout each period of incremental training and improved during each taper period, rising iteratively in this way to be clearly above baseline by the end of the second taper. The blood lactate clearance rate increased transiently in early training before declining from the middle of the first training period to the middle of the first taper; thereafter, gamma2 increased above baseline in each trainee throughout the remaining first taper and the major portion of the second training period, decreasing only in the final criterion performance test. The time to peak lactate declined from baseline throughout all phases of training and taper. Peak blood lactate increased in all subjects to the end of the first taper before declining by the end of the second training period, rising again to baseline levels during the second taper. The change in gamma2 was examined relative to the work rate achieved in cycle ergometry above an initial baseline score (deltaCP) and against concurrent peak blood lactate. There was a clear upward shift in gamma2 above baseline throughout the first and second training and taper in two subjects; this was less clear in the remaining two subjects, each of whom had a lower deltaCP. We conclude that this indicates improved lactate clearance, manifest by the change in gamma2 induced by endurance training.

Effect of Training on the Physiological Factors of Performance in Elite Marathon Runners (Males and Females)

“…Georges Brooks' group have demonstrated that endurance training enhanced the whole body and leg lactate clearance at a high relative power output [5,20]. This had already been reported by Fukuba et al [22] who measured the kinetics of the blood lactate after a 30 W min -1 ramp cycle ergometer test to exhaustion. Marathoners performed many long -slow distance runs in winter and they probably had already enhanced their lactate clearance.…”

Training Techniques to Improve Endurance Exercise Performances

“…[86] Although the greater 'fatigue resistance' of better distance athletes is not well-understood, [86,87] superior endurance performances may be related to lower rates of lactate accumulation in working muscles. [72,81,[88][89][90][91][92][93] In highly trained endurance athletes, there is little increase in plasma lactate concentration with increasing work rates [41] until exercise intensity reaches 80 to 85% of V . O 2peak .…”

Traditional and quantitative analysis of acid‐base and electrolyte imbalances in horses competing in cross‐country competitions at 2‐star to 5‐star level

“…The horses investigated in our study usually were walked during the first 30 minutes of recovery. The ability to remove lactate is directly associated with the oxidative capacity of muscle fibers and it has been shown that the rate of lactate disappearance increases with training . Horses competing at higher level therefore may have been able to remove lactate at a higher rate compared to those competing at lower level as a result of higher oxidative capacity of their muscles.…”