Speed and incline
We recommend a speed limit of at least 16km/h (10mph) for runners. We suggest adding a couple of km/h to your regular running speed. Incline (gradient) is a fantastic feature on treadmills as this is a simple way to add resistance, target different muscle groups and reduce impact on your joints. Most treadmills offer a decent incline range. The wider range, the more intense a workout it offers.