Premium
Determination and validation of peak fat oxidation in endurance‐trained men using an upper body graded exercise test
Author(s) -
Hansen Mikkel Thunestvedt,
Rømer Tue,
Frandsen Jacob,
Larsen Steen,
Dela Flemming,
Helge Jørn Wulff
Publication year - 2019
Publication title -
scandinavian journal of medicine and science in sports
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.575
H-Index - 115
eISSN - 1600-0838
pISSN - 0905-7188
DOI - 10.1111/sms.13519
Subject(s) - cycle ergometer , vo2 max , medicine , coefficient of variation , zoology , exercise intensity , body fat percentage , cardiology , chemistry , heart rate , anthropometry , biology , chromatography , blood pressure
Peak fat oxidation rate (PFO) and the intensity that elicits PFO (Fat max ) 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 Fat max in trained men using a GE protocol applying double poling on a ski‐ergometer. PFO and Fat max 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 V̇O 2peak on the ski‐ergometer in 10 endurance‐trained men (V̇O 2peak : 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 Fat max (GE1: 41 ± 2%; GE2: 43 ± 3% of V̇O 2peak , P = .457) and the intra‐individual coefficient of variation (CV) was 8 ± 2% and 11 ± 2% for PFO and Fat max , respectively. Between GE and SCE tests, PFO (GE avg : 0.44 ± 0.03; SCE; 0.47 ± 0.06 g·min −1 , P = .510) was not different, whereas a difference in Fat max (GE avg : 42 ± 2%; SCE: 52 ± 4% of V̇O 2peak , P = .030) was observed with a CV of 17 ± 4% and 15 ± 4% for PFO and Fat max , respectively. In conclusion, GE has a high day‐to‐day reliability in determination of PFO and Fat max in trained men, whereas it is unclear if PFO and Fat max determined by GE reflect continuous exercise in general.