Runners typically save their very best for race day: Their freshest legs, their best headspace, and their spediest shoes, hopefully coalesce to achieve a fast time. But, the vast majority of a runner’s pavement pounding comes during training, and those practice runs require different sneakers. For those long hours, runners need a good training shoe: Unlike a racing shoe which is meant to propel a runner forward, a training shoe should feel softer, expertly absorbing the repeated pounding on the pavement to lessen impact on the joints. At the same time, it should have some spring to its step to make those long runs palatable. . Enter Nike’s new Pegasus Turbo.