Individual anaerobic threshold estimates maximal lactate steady state in temperate and hot climate.
BACKGROUND
The aim of the present study was to compare the power output at the maximal lactate steady state (MLSS) with the power output at the individual anaerobic threshold (IAT) and at the onset of blood lactate accumulation (OBLA) in both temperate (TEMP) (22 °C) and hot (HOT) (40 °C) climates.


METHODS
Eight young active male (23.9±2.4 yr, 75.9±7.3 kg and 47.8±4.9 mL/kg/min) were evaluated on a cycle ergometer and performed a progressive exercise test until fatigue to determine the IAT and OBLA and two to five 30-min exercise tests at constant intensities for determine MLSS at both temperatures. An ANOVA with repeated measures and Dunnett's post-hoc test was performed to compare results of IAT and OBLA to the variables at the MLSS in both climates with MLSS being considered as the standard.


RESULTS
At TEMP there was no difference between the power output at MLSS and IAT (180±11 W and 182±13 W, respectively), however, the intensity of the OBLA (154±11 W) was lower than MLSS (P<0.05). At HOT there was no difference between the power output at MLSS, IAT, and OBLA (148±11 W, 155±12 W and 144±11 W, respectively).


CONCLUSIONS
These results showed that IAT is sensitive enough to estimate MLSS in both TEMP and HOT climate.
Laboratory of Exercise Physiology, Department of Physical Education, School of Physical Education, Physical Therapy and Occupational Therapy, Federal University of Minas Gerais (UFMG), Belo Horizonte, Brazil - cristianolino@gmail.com.
Cristiano L Monteiro
CL
De Barros
Thiago T
TT
Mendes
Lucas De Ávila Castro Fleury
Lde Á
Mortimer
Guilherme Passos
GP
Ramos
Emerson Silami
ES
Garcia
D015308:Anaerobic Threshold / Q000502:physiology*; D001642:Bicycling / Q000502:physiology; D002980:Climate; D005080:Exercise Test; D005221:Fatigue / Q000503:physiopathology; D006339:Heart Rate / Q000502:physiology; D006801:Humans; D019344:Lactic Acid / Q000097:blood*; D008297:Male; D010101:Oxygen Consumption; D014887:Weather; D055815:Young Adult
D019344:Lactic Acid