Originally Posted by wolfchild

Well let me tell you that you are absolutly wrong. It all depends on the hills and what type of bike the person is riding. Standing up is very effective and easy way of going up hills and it's the only way to get up hills for people who ride singlespeed/fixed gear. Sitting in your seat and mashing is bad for your knees.
Your comments about weak legs and more training are way off the mark.