Running sucks for me. I climb; Riding is the best cross training that works for me. Put a back pack on with gear and a coil of rope and jump on your ride and see what it does for ya. Running is hard on your joints. You don’t need pain in your joint if you’ll be pulling off some 5-10s or what ever your ability is. I made some good moves in the past and I think it was due to my strength from riding