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Fat oxidation during exercise is associated with cardio-metabolic benefits, but the extent of which whole-body exercise modality elicits the greatest fat oxidation remains unclear. We investigated the effects of treadmill, elliptical and rowing exercise on fat oxidation in healthy individuals. Nine healthy males participated in three, peak oxygen consumption tests, on a treadmill, elliptical and rowing ergometer. Indirect calorimetry was used to assess maximal oxygen consumption (V̇O 2peak ), maximal fat oxidation (MFO) rates, and the exercise intensity MFO occurred (Fat max ). Mixed venous blood was collected to assess lactate and blood gases concentrations. While V̇O 2peak was similar between exercise modalities, MFO rates were higher on the treadmill (mean ± SD; 0.61 ± 0.06 g·min -1 ) compared to both the elliptical (0.41 ± 0.08 g·min -1 , p = 0.022) and the rower (0.40 ± 0.08 g·min -1 , p = 0.017). Fat max values were also significantly higher on the treadmill (56.0 ± 6.2 %V̇O 2peak ) compared to both the elliptical (36.8 ± 5.4 %V̇O 2peak , p = 0.049) and rower (31.6 ± 5.0 %V̇O 2peak , p = 0.021). Post-exercise blood lactate concentrations were also significantly lower following treadmill exercise ( p = 0.021). Exercising on a treadmill maximizes fat oxidation to a greater extent than elliptical and rowing exercises, and remains an important exercise modality to improve fat oxidation, and consequently, cardio-metabolic health.

Maximal Fat Oxidation: Comparison between Treadmill, Elliptical and Rowing Exercises