I think by "inside", he means the quads...
What would also help is to make sure your seat is set up optimally. A lot of people have their seats too low and too far back. Easy test is to place your heel over the pedal-spindle and pedal backwards. At the very bottom where the crank is parallel to the seat-tube, your leg should be completely extended. This is the minimum height and a lot of people ride slightly higher (depending upon shoe+cleat thickness, crankarm-length, road, or track, etc.).
also use easy gears and spin fast. You should hardly ever feel yourself pushing on the pedals at all. But rather feel like you're spinning madly in circles like a hamster... This lowers peak muscle-force required to generate any given amount of power & speed. The lower forces will give you more endurance, lets you ride farther and faster, and reduces aches & pains in your joints.
Last edited by DannoXYZ; 10-06-06 at 01:39 AM.