title: Lactate threshold prediction by blood glucose and rating of perceived exertion in people with type 2 diabetes.
abstract: The validity of rating of perceived exertion (RPE) in predicting lactate threshold during an incremental test was analyzed in 15 men with type 2 diabetes (M age = 53.4 yr., SD = 12.9). Blood glucose, lactate, and minute ventilation (VE)/VO2 responses identified the lactate, ventilatory, and glucose thresholds. Workloads (W) corresponding to RPEs 12, 13, 14, and 15 were determined. Second-order polynomials fit to VE/W and [lac]/W ratios corresponding to RPEs of 9-10, 12-13, and 16-17 also identified workloads above which there was an overproportional increase in VE and [lac]. These workload breakpoints did not differ, although at RPE 12 underestimated and at RPE 15 overestimated lactate threshold. RPE 13 and 14 and the responses of VE/W and [lac]/W to submaximal exercise accurately predicted lactate threshold.
authors.affiliation: Catholic University of Brasília-UCB, DF-Brazil. hgsimoes@gmail.com
authors.forename: Herbert Gustavo
authors.initials: HG
authors.lastname: Simões
authors.forename: Wolysson Carvalho
authors.initials: WC
authors.lastname: Hiyane
authors.forename: Ronaldo Esch
authors.initials: RE
authors.lastname: Benford
authors.forename: Bibiano
authors.initials: B
authors.lastname: Madrid
authors.forename: Francisco Andriotti
authors.initials: FA
authors.lastname: Prada
authors.forename: Sérgio Rodrigues
authors.initials: SR
authors.lastname: Moreira
authors.forename: Ricardo Jacó
authors.initials: RJ
authors.lastname: de Oliveira
authors.forename: Fábio Yuzo
authors.initials: FY
authors.lastname: Nakamura
authors.forename: Carmen Sílvia Grubert
authors.initials: CS
authors.lastname: Campbell
mesh_terms: D000328:Adult; D000368:Aged; D015308:Anaerobic Threshold / Q000502:physiology*; D001786:Blood Glucose / Q000378:metabolism*; D003924:Diabetes Mellitus, Type 2 / Q000503:physiopathology* / Q000523:psychology*; D015444:Exercise / Q000502:physiology* / Q000523:psychology*; D005080:Exercise Test; D006801:Humans; D007600:Judgment; D019344:Lactic Acid / Q000097:blood*; D008297:Male; D008875:Middle Aged; D015203:Reproducibility of Results; D056152:Respiratory Rate / Q000502:physiology
chemical_list: D001786:Blood Glucose; D019344:Lactic Acid