@The constellation g** slayer you ARE aware, that strides are in an arc and not a flat plain, correct? When you run, there is a moment in time where both feet are off the ground because you are applying the force DOWN. You then have to wait until your feet reach the ground before exerting more force. There is a maximum speed that you can move and that is the maximum speed your legs can move. When you weigh less, it takes less strides you reach your maximum speed. When you weigh more, you have more balance, but it takes more strides to reach your maximum speed. This is basic real life physics that engineers fight against every day. It's also the reason why japan doesn't win the olympic gold for the 400m. <- this is a joke