My theory is because of constant tiki - taka passing of the ball, it amazes me sometimes how we are so good at passing and controlling the ball at such pace and power, with the
amount of position we have is
almost unreal, imagine the vibrations that run up your legs and knees each time you stop and kick the ball and we are the champions of tiki - taka, if your thinking why not the same to Barcelona but they have injuries too but its a warmer climate and needs less warm to the legs,