>It would be interesting to compare times with other shoes under controlled conditions, but likely there are hundreds of factors more important that small diffe

>It would be interesting to compare times with other shoes under controlled conditions, but likely there are hundreds of factors more important that small differences in the shoes The shoes reduce oxygen consumption by 4%, which translates to 2 minutes in a marathon. They are the primary contributor to the sub 2 marathon stunt. The effort in a regular race without those shoes would have produced about a 2:03. Shoes -2 minutes, drafting effects from the lead vehicle and contrived pacers, another minute.