A Novel Approach for Lactate Threshold Assessment Based on Rating of Perceived Exertion

作者：Fabre Nicolas^*; Mourot Laurent; Zerbini Livio; Pellegrini Barbara; Bortolan Lorenzo; Schena Federico

来源：International Journal of Sports Physiology and Performance, 2013, 8(3): 263-270.

• anaerobic threshold
• perceived exertion
• incremental test

This study tested the hypothesis that the D-MAX (for maximal distance) method could be applied to ratings of perceived exertion (RPE), to propose a novel method for individual detection of the lactate threshold (LT) using RPE alone during an incremental test to exhaustion. Twenty-one participants performed an incremental test on a cycle ergometer. At the end of each stage, lactate concentration was measured and the participants estimated RPE using the Borg CR100 scale. The intensity corresponding to the fixed lactate values of 2 or 4 mmol . L-1 (2mM and 4mM), the ventilatory threshold (VT), the respiratory-compensation point (RCP), and the instant of equality of pulmonary gas exchange (RER=1.00) were determined. Lactate (D-MAX La) and RPE (D-MAX (RPE)) thresholds were determined using the D-MAX method. Oxygen uptake (VO2), heart rate, and power output measured at D-MAX (RPE) and at D-MAX (La) were not statistically different. Bland-Altman plots showed small bias and good agreements when D-MAX (RPE) was compared with the D-MAX (La) and RER=1.00 methods (bias = -0.05% and -2% of VO2max, respectively). Conversely, VO2 from the D-MAX (RPE) method was lower than VO2 at 4 mM and at RCP and was higher than VO2 at 2 mM and at VT. VO2 at D-MAX (RPE) was strongly correlated with VO2 at D-MAX (La) (r = .97), at RER=1.00 (r = .97), at 2 mM (r = .85), at 4 mM (r = .93), at VT (r = .95), and at RCP (r = .95). The combination of the D-MAX method with the RPE responses permitted precise and individualized estimates of LT using the D-MAX method.

• 出版日期2013-5