Six weeks of aerobic training improves VO2max and MLSS but does not improve the time to fatigue at the MLSS.
The purpose of this study was to investigate the effects of a 6-week aerobic training period on the time to fatigue (t lim) during exercise performed at the maximal lactate steady state (MLSS). Thirteen untrained male subjects (TG; age 22.5 ± 2.4 years, body mass 72.9 ± 6.7 kg and VO2max 44.9 ± 4.8 mL kg(-1) min(-1)) performed a cycle ergometer test until fatigue at the MLSS power output before and after 6 weeks of aerobic training. A group of eight control subjects (CG; age 25.1 ± 2.4 years, body mass 70.1 ± 9.8 kg and VO2max 45.2 ± 4.1 mL kg(-1) min(-1)) also performed the two tests but did not train during the 6-week period. There were no differences between the groups with respect to the VO2max or MLSS power output (MLSSw) before the treatment period. The VO2max and the MLSSw of the TG increased by 11.2 ± 7.2 % (pre-treatment = 44.9 ± 4.8 vs. post-treatment = 49.8 ± 4.5 mL kg(-1) min(-1)) and 14.7 ± 8.9 % (pre-treatment = 150 ± 27 vs. post-treatment = 171 ± 26 W), respectively, after 6 weeks of training. The results of the CG were unchanged. There were no differences in t lim between the groups or within groups before and after training. Six weeks of aerobic training increases MLSSw and VO2max, but it does not alter the t lim at the MLSS.
Laboratory of Exercise Physiology, Federal University of Minas Gerais, Av Antônio Carlos, 6627 Belo Horizonte, Minas Gerais CEP: 31270-901, Brazil.
Thiago Teixeira
TT
Mendes
Tatiana Ramos
TR
Fonseca
Guilherme Passos
GP
Ramos
Carolina Franco
CF
Wilke
Christian Emmanuel Torres
CE
Cabido
Cristiano Lino Monteiro
CL
De Barros
André Maia
AM
Lima
Lucas de Avila Carvalho Fleury
Lde A
Mortimer
Moisés Vieira
MV
de Carvalho
Mauro Martins
MM
Teixeira
Nilo Resende Viana
NR
Lima
Emerson Silami
ES
Garcia
D050154:Adiposity; D000328:Adult; D015308:Anaerobic Threshold; D000704:Analysis of Variance; D001642:Bicycling; D015415:Biomarkers / Q000097:blood; D001938:Brazil; D015444:Exercise; D005080:Exercise Test; D006339:Heart Rate; D006801:Humans; D019344:Lactic Acid / Q000097:blood*; D008297:Male; D009119:Muscle Contraction; D018763:Muscle Fatigue; D053580:Muscle Strength; D018482:Muscle, Skeletal / Q000378:metabolism*; D010101:Oxygen Consumption; D013997:Time Factors; D055815:Young Adult
D015415:Biomarkers; D019344:Lactic Acid