What is better for XC cross training, MTN Biking or Road Cycling?

Mountain biking will give you a better workout. Hill climbs, maneuvering over rocks and stumps, and overall uneven terrain will burn up your quads and lungs more than jumping on a road bike and sitting on a consistent 18-20 mph around the roads. Unless you're doing a lot of hill climbs. But I still vote mountain biking. Plus it's a lot more fun.

road cycling. Mtn biking is too slow

ElliptoGo?

10k MAN wrote:

road cycling. Mtn biking is too slow

Ride faster? It doesn't have to be slow. Regardless, it is slower than road biking but you're working harder with every pedal. I take road bikers mountain biking with me from time to time and they're amazed how hard it is and have trouble keeping up. These are guys who burn me when we're biking on the road.

Road cycling. Mountain biking is like doing intervals. You don't get the sustained endurance and aerobic capacity.