Does being lighter make you a faster runner?
Does being lighter make you a faster runner? Your body basically has a fixed power, P, in watts. If you run on a flat course, you use that ability to overcome running resistance and air resistance. If you lose a few pounds, your power remains constant (because your strength is unchanged), but your running resistance decreases. Result: you can run faster.
How much faster will I run if I lose 10kg?
Based on this number of 2.7 seconds per kg per km and that you have lost 10 kg and are running a 10k that evaluates to: 2.7 * 10 * 10 = 270 seconds! And that time is based on weight loss alone, so with additional training you could expect to do better!