Advances of the reverse lactate threshold test: Non-invasive proposal based on heart rate and effect of previous cycling experience

Autor(es)

Dalcheco Messias, Leonardo Henrique ^[1] ; Camolese Polisel, Emanuel Elias ^[1] ; Manchado-Gobatto, Fulvia Barros ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Appl Sci, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: PLoS One; v. 13, n. 3 MAR 13 2018.
• Citações Web of Science: 1

Resumo

Our first aim was to compare the anaerobic threshold (AnT) determined by the incremental protocol with the reverse lactate threshold test (RLT), investigating the previous cycling experience effect. Secondarily, an alternative RLT application based on heart rate was proposed. Two groups (12 per group-according to cycling experience) were evaluated on cycle ergometer. The incremental protocol started at 25 W with increments of 25 W at each 3 minutes, and the AnT was calculated by bissegmentation, onset of blood lactate concentration and maximal deviation methods. The RLT was applied in two phases: a) lactate priming segment; and b) reverse segment; the AnT (AnT(RLT)) was calculated based on a second order polynomial function. The AnT from the RLT was calculated based on the heart rate (AnT(RLT-HR)) by the second order polynomial function. In regard of the Study 1, most of statistical procedures converged for similarity between the AnT determined from the bissegmentation method and AnT(RLT). For 83% of non-experienced and 75% of experienced subjects the bias was 4% and 2%, respectively. In Study 2, no difference was found between the AnT(RLT) and AnT(RLT-HR). For 83% of non-experienced and 91% of experienced subjects, the bias between AnT(RLT) and AnT(RLT-HR) was similar (i.e. 6%). In summary, the AnT determined by the incremental protocol and RLT are consistent. The AnT can be determined during the RLT via heart rate, improving its applicability. However, future studies are required to improve the agreement between variables. (AU)

• Processo FAPESP: 12/06355-2 - Padronização de testes específicos livres e atados, para determinação de parâmetros aeróbios e anaeróbios em canoagem slalom: relações com a performance
• Beneficiário: Fúlvia de Barros Manchado Gobatto
• Modalidade de apoio: Auxílio à Pesquisa - Regular