Originally Posted by
erig007
I bet it affects more people riding lightweight bicycles than people riding heavy bikes since the later must push harder on the pedal to move the bike
Your "theory" doesn't make any sense. I am sure all those pro racers with their light bikes pedal much harder then an average commuter on their heavy bike...A 30 pound commuter bike will not increase your bone density anymore then a 19 pound race bike, it doesn't matter how hard you pedal... The only way to increase bone density is through weight training, plyometrics and sprint running.