Originally Posted by terrymorse
I'm just not sure I agree that biking doesn't work the calves. On a nice flat stretch of road, sure the calves don't do a whole lot. But on a killer 5 mile climb, mashing out of the saddle, MAN do my calves burn. An even more exagerated example is tackling short but STEEP sections of singletrack on a mountain bike. On more than one occasion, I have had difficulty climbing stairs after one of these brutal sessions. You might call these examples "isometric", but they are still excersises done on a bicycle.