Hurty knees? - Newbie question!

You need to change to a fucking massive gear. Something like 53x11, and 53x12 in the Winter.

It's a well known fact that peripheral tendon fibres in the patella region (both medial and lateral) generate fastest at cadences of less than 40rpm, particularly with a cashew-rich diet.

What a load of bollocks! It's pistachios.