Ski wheeling is a gliding sport designed to replicate the skating style of cross-country skiing on a hard surface.
It's a complete sport that involves both the upper body and the legs. It is practised in the same way as cross-country skiing, using poles to accompany the thrust of the legs to move forward.
It's also a great way to improve your stamina, like cycling or running, but with the added benefit of being very easy on your joints and back.