Newton Running Sir Isaac Newton uses a system of rubber lugs on the sole that rebound on impact, increasing efficiency by eliminating detrimental heel strikes that are often the result of late mileage fatigue. $149. newtonrunning.com
Nike Free 5.0 The newest in the line of Frees, the 5.0 has been “freed” by a grid of deep cuts throughout the sole, which allow the entire shoe to flex laterally as well as back-and-forth. $110. nikerunning.com
Ecco Biom B
The Biom offers a supremely flexible forefoot coupled with a stiff shank in the heel and mid foot. The result is a laterally stiff shoe that doesn’t flex at all until you’re in the middle of your stride. A lower heel profile also helps transition the runner from heel to toe.
$219. eccousa.com
