摘要：Comeau, MJ, Adams II, TM, Church, JB, Graves, MM, Lawson, PM. Prediction of Lower Extremity Lactate Levels in Exercising Muscle Utilizing Upper Extremity Sampling Sites. JEPonline 2011:14(1):20-27. Getting an accurate measurement of blood lactate from working muscles is still debatable as to the most representative sampling site. The purpose of this study was to determine the relationship between lactate sampled from a non-exercising limb site in an effort to predict the blood lactate in an exercising limb in the field under non-laboratory settings. Eleven male subjects volunteered to participate in this study. After the 5 min warm-up period, subjects began pedaling at constant self-selected cadence between 80-90 rpm at a workload of 100 watts on a Velotron cycle ergometer. Each stage lasted 5 min with the intensity increasing by 50 watts in each subsequent stage. Once the subjects reached volitional fatigue, the foot was removed from the shoe, and blood samples were obtained from the great toe and the fingertip. Lactate was measured immediately post-exercise, and at 5 and 10 min post-exercise. A linear regression analysis was performed to evaluate the prediction of lower extremity lactate from the upper extremity sampling site (fingertip) immediately post-exercise, 5 min post-exercise, and 10 min postexercise. The formulas were Y=.597x + 1.282, Y = .765x + .782, and Y = .670x + .862, respectively. At 5 min post-exercise, 75% of the variance (R2 =0.755) in toe lactate was shown in finger lactate. The blood lactate sampled from the finger 5 min post-exercise is the best place and time to indicate the lower extremity lactate in endurance athletes using primarily the lower extremity.
