for optimum comfort, too, and the horizontal flex grooves aid the runner’s natural stride.Comfort is the bottom line with these shoes and that can't be a bad thing. They feature an inner mesh sleeve for the foot and a soft fitting system that attaches from
as if verbally running the race he’s describing. “There’s no margin for error,” he says. “There are around 150 strides that you have to get spot on. Six-tenths of a second separates first and last, so you have to analyse what works. The technical side of things
