>But people who only ride bikes tend to end up with lower bone density and weak core muscles. Really depends what biking, Downhill biking needs more Core muscl

>But people who only ride bikes tend to end up with lower bone density and weak core muscles. Really depends what biking, Downhill biking needs more Core muscles the anything i know, with one exception witch is Motocross. Sprinting Street-bike training also needs loots of Arm-muscles.