Modern tracks are often constructed out of recycled rubber tires. The track surface is very resilient, deforming slightly when you push down on it and then bouncing back when you stop pushing. They return energy to the runners' feet as the feet rise upward after coming to a stop. This energy isn't returned to the feet as they rise upward. A rubber track still cushions the runners' feet, but it also returns energy to those feet as they rebound upward.
Bicyclists now use aerodynamically designed bicycles and clothing to minimize air drag.
Drafting would be of no value because the front bicycle won't have any affect on the air it passed through. Since forces come in equal but oppositely directed pairs, the bicycle must push forward on the air. This effect leaves the air moving forward on average. When the second bicycle encounters the forward moving air, it experiences less than the usual drag and has an easier time moving forward. If, however, the first bicycle experiences zero drag, the air behind that bicycle doesn't experience any forward force and is left unaffected by the first bicycle's passage.