Direct Determination of Lactate Threshold
Similar to the of vo2 max, the determ nation of the lactate threshold requires athletes to be tested in a manner that simulates their competi tive movements of testing. Testing protocols to determine the lactate threshold geRe ally begin with a two- to five-minute warm-up at a work rate followed by a stepwise increase in the power output every one to three minutes G76, 92, 95 Lactate threshold 98, 99, 104) In general, the stepwise increases in work ate are small in to provide better resolution in he determination of the lactate threshold (04) oxygen uptake (l/min) To determine the blood concentration of lactate, Figure 20A Typical graph of the changes in blood ood samples are obtained at each work rate from a lactate concentrations during an incremental exercise atheter (an indwelling tube placed in an artery or test. The sudden rise in blood lactate is called the ein in the subject's arm or from a small puncture of lactate threshold. he fingertip. After the test, these blood samples are hemically analyzed for lactate, and the concentration to subjectively t each exercise stage is then graphed against the oxy allow two independent investigators inspection en consumption at the time the sample is removed. pick the lactate breakpoint" by visual in his coRcept is illustrated in Fig. 20A. How is the lac- a third te threshold determined? Recall that the definition disagree as to where the threshold occurs, the lactate threshold is the exercise intensity be vestigator is used to arbitrate. often be re there is a systematic and continuous rise in blood the lactate "break point straight line tate concentration. Although several techniques chosen by using a ruler and drawing
Lactate Threshold ตรงกำหนด Similar to the of vo2 max, the determ nation of the lactate threshold requires athletes to be tested in a manner that simulates their competi tive movements of testing. Testing protocols to determine the lactate threshold geRe ally begin with a two- to five-minute warm-up at a work rate followed by a stepwise increase in the power output every one to three minutes G76, 92, 95 Lactate threshold 98, 99, 104) In general, the stepwise increases in work ate are small in to provide better resolution in he determination of the lactate threshold (04) oxygen uptake (l/min) To determine the blood concentration of lactate, Figure 20A Typical graph of the changes in blood ood samples are obtained at each work rate from a lactate concentrations during an incremental exercise atheter (an indwelling tube placed in an artery or test. The sudden rise in blood lactate is called the ein in the subject's arm or from a small puncture of lactate threshold. he fingertip. After the test, these blood samples are hemically analyzed for lactate, and the concentration to subjectively t each exercise stage is then graphed against the oxy allow two independent investigators inspection en consumption at the time the sample is removed. pick the lactate breakpoint" by visual in his coRcept is illustrated in Fig. 20A. How is the lac- a third te threshold determined? Recall that the definition disagree as to where the threshold occurs, the lactate threshold is the exercise intensity be vestigator is used to arbitrate. often be re there is a systematic and continuous rise in blood the lactate "break point straight line tate concentration. Although several techniques chosen by using a ruler and drawing
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