3126
document
Evaluating a test protocol for predicting maximum lactate steady state . BACKGROUND Maximum lactate steady state ( MLSS ) is defined as the highest steady state exercise level one can maintain while also maintaining an equilibrium between the elimination of blood lactate and the diffusion of lactate into the blood . MLSS is an excellent tool for assessing fitness level , predicting endurance performance , and designing training programs . METHODS This investigation assesses the validity of the Lactate Minimum Test ( LMT ) , which consists of inducing lactic acidosis through a VO2peak test , followed by an eight-minute walking recovery and an incremental exercise test , to determine if the running velocity associated with the minimum lactate value predicts the MLSS velocity . Following this LMT , two constant velocity 28-minute runs were performed , one at the predicted MLSS velocity ( trial 1 ) and the other 0.13 m sec-1 ( 4-8 % ) above the predicted MLSS velocity ( trial 2 ) . Ten active female subjects participated ( 32 +/- 7 yrs ( mean +/- SD ) ; 65.7 +/- 16.4 kg ; VO2peak 40.0 +/- 7.5 ml.kg-1.min-1 ) . RESULTS During trial 1 , there was a -0.6 +/- 0.3 mmol l-1 ( mean +/- SE ) change in lactate . Based on a definition of lactate steady state ( LSS ) as less than a 0.5 mmol.l-1 increase , this value signified LSS . A similar comparison during trial 2 revealed a 1.8 +/- 0.3 mmol.l-1 increase in lactate , signifying a workload above LSS and therefore confirming trial 1 as the maximum LSS ( MLSS ) . CONCLUSIONS These results suggest that the test protocol accurately predicted the MLSS velocity .
3127
Intervention_Physical
Lactate Minimum Test ( LMT )
3128
Outcome_Physical
maximum lactate steady state .
3129
Outcome_Physical
change in lactate .
3130
Outcome_Physical
lactate steady state ( LSS )
3131
Outcome_Physical
lactate
3132
Outcome_Physical
MLSS velocity .
3133
Participant_Sample-size
Ten
3134
Participant_Sex
female
3135
Participant_Age
32 +/- 7 yrs ( mean +/- SD