Whats the point of doing a warm up? Well... in this episode Ed enlightens us as to what the purpose of warm up is and how it limits the chance of injury by:-
Literally warming up the muscles making them more pliable and less likely to get strained.
Lubricating the joints
Increasing blood flow and nutrients
Decreasing toxins
Practicing key movement sequences to ensure the right muscles are turned on and firing.

I'm sure after listening to this one you'll never skip a warm up again and you won't want to!