This is one of those times when I think there is no nice neat equivalent. We generally refer to them in separate categories. I have had to find this temr in the past and have never been able to come up with a short phrase for it. If it is limited to board sports, then you can use that. Your context includes rollerblading and so board sports is no good. Blade sports does however cover that, but not the board sports. Sliding and gliding sound ridiculous of course as sliding makes you think of children playing on a slide and suggests an element of "freewheeling" not being in control of where you going, which is not the general idea when you're rollerblading! Gliding cannot work of course either as that is very specifically "planeur". Blade sports covers ice skating and (perhaps) also skiing.

Try the above. I may even market it because apart from the reserve with skiing, it covers just about all.

Nikki