ive been hearing that when you bike you mostly use your quads? is this true?
my problem is that when i stand up to pedal up a big hill...i can only stand and deliver full power for about 10 sec. to 30 sec. MAX
i want to work this part of my muscle out so i can get stronger at doing this.
what part of my quad should i work on? and what work out do you know of that would work this best. (besides actually riding the bike and standing up)