This study was carried out to compare blood lactate changes in isocapnic buffering phase in an incremental exercise test between sprinters and long distance runners, and to seek the possibility for predicting aerobic or anaerobic potential from blood lactate changes in isocapnic buffering phase. Gas exchange variables and blood lactate concentration ([lactate]) in six sprinters (SPR) and nine l...

The effect of blood injected into either subarachnoid space or subcortical brain tissue upon lactate and pyruvate concentrations as well as acid-base balance of cerebrospinal fluid (CSF) was studied in the anesthetized dog. CSF lactate and lactate/pyruvate ratio (L/P ratio) increased progressively following the intracranial injection of blood and reached the maximum level at six hours after inj...

A first-generation semi-automatic amperometric lactate analyzer (Yellow Springs Instrument Co.) was assessed for urgent ("stat"), rapid laboratory measurements in whole blood and cerebrospinal fluid. For whole blood, measured lactate concentration and hematocrit were linearly correlated. An improved equation is presented for estimating the concentration of lactate in plasma from measurements in...

To determine the relation between regional myocardial blood flow, contractile function, and myocardial lactate release during mild-to-moderate regional myocardial ischemia, nine openchest swine were instrumented for measurement of regional myocardial blood flow (microsphere method), contractile function (sonomicrometry), and hemodynamics. L-[1-14C]Lactate or L[U-3C]lactate was infused intraveno...

We report the features of a sensor for determining L-lactate. An oxygen sensor, coupled to a nylon net with chemically bound L-lactate oxidase (EC 1.1.3.2), is inserted into an artificial pancreas (Biostator, Miles) "downstream" from the glucose sensor. We used the sensor to continuously monitor the L-lactate concentration in blood after a "glucose clamp" experiment with a diabetic patient. L-L...

Dynamic activities such as running, cycling, and swimming have been shown to effectively reduce lactate in the postexercise period. It is unknown whether core stabilization exercises performed following an intense bout would exhibit a similar effect. Therefore, this study was designed to assess the extent of the lactate response with core stabilization exercises following high-intensity anaerob...

l. Aspects of blood physiology-hematocrit, oxygen capacity and affinity, lactate content, pH and composition of blood buffers-were investigated in the lizards Varanus got&z% and Sauromalus hispidus during activity at different temperatures. 2. Although oxygen capacity and affinity, resting pH and lactate levels, bicarbonate and phosphate concentrations are nearly identical in both species, only...