To burn the most calories on the Precor EFX, is it better to go faster or increase the resistance?

The most effective way to burn calories on the Precor EFX is first to increase resistance, and second to increase user speed. However, increasing resistance will have a higher RPE than increasing speed for most users even though the physiological differences are not that great, so exercisers should take this into consideration when building programs. Training in the reverse direction has also been shown to have a notable increase in heart rate and be a good way to vary workouts without compromising training intensity.