title: Lactic threshold vs ventilatory threshold during a ramp test on a cycle ergometer.
abstract: OBJECTIVE
  The purpose of this investigation was to study the relationship between the lactate (LT) and the ventilatory threshold (VT) during a ramp protocol in cycle ergometry.
  
  
  METHODS
  Thirty nine trained male subjects were selected as subjects.
  
  
  METHODS
  All the subjects performed a maximal ergometric test on a cycle ergometer consisting of a ramp protocol (increases of 25 W.min-1). The anaerobic threshold (AT) was determined using both ventilatory gas analysis (VT) and lactate measurement (LT). All the data related to the VT and LT were expressed in work rate (W), VO2 (ml.kg-1.min-1) and heart rate (bpm) and expressed as mean and standard deviation. Lactate threshold (LT) and ventilatory threshold (VT) were compared using the Student's "t"-test for paired data. Correlation coefficients between both variables were also calculated. Statistical significance was accepted at the 5% level.
  
  
  RESULTS
  Results showed significant differences (p < 0.05) between mean values of VT and LT when both expressed either as heart rate (bpm), work rate (W), or VO2 (ml.kg-1.min-1).
  
  
  CONCLUSIONS
  It was concluded that LT and VT occur at different exercise intensities during ramp protocol exercise on a cycle ergometer.
authors.affiliation: Unit of Investigation, School of Medicine of Physical Education and Sport, Complutense University of Madrid, Spain.
authors.forename: J L
authors.initials: JL
authors.lastname: Chicharro
authors.forename: M
authors.initials: M
authors.lastname: Pérez
authors.forename: A F
authors.initials: AF
authors.lastname: Vaquero
authors.forename: A
authors.initials: A
authors.lastname: Lucía
authors.forename: J C
authors.initials: JC
authors.lastname: Legido
mesh_terms: D000328:Adult; D015308:Anaerobic Threshold; D015444:Exercise / Q000502:physiology*; D005080:Exercise Test; D006339:Heart Rate; D006801:Humans; D019344:Lactic Acid / Q000097:blood*; D008297:Male; D010101:Oxygen Consumption; D012119:Respiration
chemical_list: D019344:Lactic Acid