It's now three years since I injured my knees and had surgery followed by leg casts. During the few months following I lost a serious amount of muscle in my thighs, particularly lower down just above the knee itself - you know the teardrop shaped muscle on the inside of the thigh (vastus medialis). I was wondering if you hardened cyclists can comment on cycling's effectiveness at building this up. My natural inclination is to use weight training, but I think this is what caused the problem with my knee tendons in the first place so I'm reluctant to go back to it. Regular, aerobic style exercise like cycling isn't generally regarded as the first choice for 'bodybuilding', but you don't often see cyclists with skinny legs! Whaddya think?