He doesn't think it's possible, at least at the moment.
A British newspaper hired biomechanics experts to study his recent changes.
The two-time Olympian will be moving to Portland, Oregon.
The double-Olympic medalist's coach dismisses the doubters.
He is the man to beat in Moscow.
The double-Olympic gold medalist says it's nice to come back home.
Star miler Mary Cain flashed a smile on the Mondo track.
Race Results Weekly reports from London's Olympic stadium ahead of Sainsbury’s Anniversary Games.
Racing is exciting. Chasing and pacing are not.
One of the most-promising American runners could stand to make a lot of money.