Comparison of physiological responses of running on a nonmotorized and conventional motor-propelled treadmill at similar intensities

Autor(es)

Sousa, Filipe A. B. ; Manchado-Gobatto, Fulvia B. ; de A. Rodrigues, Natalia ; de Araujo, Gustavo G. ; Gobatto, Claudio A.

• Tipo de documento: Artigo Científico
• Fonte: SCIENTIFIC REPORTS; v. 12, n. 1, p. 9-pg., 2022-07-08.

Resumo

This study aimed to test the agreement of the incremental test's physiological responses between tethered running on a nonmotorized treadmill (NMT) to matched relative intensities while running on a conventional motorized treadmill (MT). Using a within-subject crossover design, nine male recreational runners (age = 22 +/- 5 years; height = 175 +/- 6 cm; weight = 68.0 +/- 16.6 kg) underwent two test sessions: one was an incremental intensity protocol on an MT; the other was on an instrumented NMT. Intensity thresholds at. (V)over dotO(2max), respiratory compensation point (iRCP), and lactate threshold (iLT) were registered for analysis, together with. (V)over dotO(2),. (V)over dotE, f(R), and blood lactate concentration ([Lac]). Comparisons were based on hypothesis testing (Student's T-test), effect sizes (Cohen's d), ICC, and Bland Altman analysis. Statistical significance was accepted at p < 0.05. Attained. (V)over dotO(2max) (MT = 52.2 +/- 7.3 mL.kg(-1).min(-1) vs NMT = 50.1 +/- 8.1 mL.kg(-1).min(-1)) and. (V)over dotO(2) at iRCP (MT = 46.3 +/- 7.2 mL.kg(-1).min(-1) vs NMT = 42.8 +/- 9.3 mL.kg(-1).min(-1)) were not different between ergometers (p = 0.15 and 0.13, respectively), with significant ICCs (0.84 and 0.70, respectively) and Pearson's correlations (r = 0.87 and 0.76, respectively). The [Lac] at iLT presented poor agreement between conditions. Significant correlations were found (r between 0.72 and 0.83) for relative power values of i(V)over dotO(2max) (6.56 +/- 1.28 W.kg(-1)), iRCP (4.38 +/- 1.50 W.kg(-1)), and iLT (4.15 +/- 1.29 W.kg(-1)) related to their counterpart obtained on MT. Results show that running on an NMT offers a higher glycolytic demand under the same relative internal load as running on an MT but with a similar aerobic response and correlated intensity determination. (AU)

• Processo FAPESP: 09/08535-5 - Padronização e validação de testes aeróbios e anaeróbios em condições de campo e laboratório, utilizando modelos livre, atado e semi-atado, em corredores fundistas e velocistas
• Beneficiário: Claudio Alexandre Gobatto
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• 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
• Processo FAPESP: 13/16710-7 - Validade e reprodutibilidade de parâmetros de capacidade e potência aeróbias e anaeróbias obtidas por meio de uma sessão de avaliação em corrida atada
• Beneficiário: Filipe Antônio de Barros Sousa
• Modalidade de apoio: Bolsas no Brasil - Doutorado