Determination and validation of peak fat oxidation in endurance-trained men using an upper body graded exercise test.
Scand J Med Sci Sports
; 29(11): 1677-1690, 2019 Nov.
Article
em En
| MEDLINE
| ID: mdl-31309617
ABSTRACT
Peak fat oxidation rate (PFO) and the intensity that elicits PFO (Fatmax ) are commonly determined by a validated graded exercise test (GE) on a cycling ergometer with indirect calorimetry. However, for upper body exercise fat oxidation rates are not well elucidated and no protocol has been validated. Thus, our aim was to test validity and inter-method reliability for determination of PFO and Fatmax in trained men using a GE protocol applying double poling on a ski-ergometer. PFO and Fatmax were assessed during two identical GE tests (GE1 and GE2) and validated against separated short continuous exercise bouts (SCE) at 35%, 50%, and 65% of VÌO2peak on the ski-ergometer in 10 endurance-trained men (VÌO2peak 65.1 ± 1.0 mL·min-1 ·kg-1 , mean ± SEM). Between GE tests no differences were found in PFO (GE1 0.42 ± 0.03; GE2 0.45 ± 0.03 g·min-1 , P = .256) or Fatmax (GE1 41 ± 2%; GE2 43 ± 3% of VÌO2peak , P = .457) and the intra-individual coefficient of variation (CV) was 8 ± 2% and 11 ± 2% for PFO and Fatmax , respectively. Between GE and SCE tests, PFO (GEavg 0.44 ± 0.03; SCE; 0.47 ± 0.06 g·min-1 , P = .510) was not different, whereas a difference in Fatmax (GEavg 42 ± 2%; SCE 52 ± 4% of VÌO2peak , P = .030) was observed with a CV of 17 ± 4% and 15 ± 4% for PFO and Fatmax , respectively. In conclusion, GE has a high day-to-day reliability in determination of PFO and Fatmax in trained men, whereas it is unclear if PFO and Fatmax determined by GE reflect continuous exercise in general.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Tecido Adiposo
/
Metabolismo dos Lipídeos
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Teste de Esforço
Limite:
Adult
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Humans
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Male
Idioma:
En
Revista:
Scand J Med Sci Sports
Assunto da revista:
MEDICINA ESPORTIVA
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Dinamarca