The most recent entrant in to the running shoe marketplace is a unique shoe from Enko. These unique athletic shoes from France were initially promoted in late 2014 and created via a crowd financing project at Indiegogo at the beginning of 2015.

This footwear features mechanical spring loaded pieces which are included in the sole. This particular design provides the shoe with additional shock absorption and energy return. This is believed to help increase comfort along with running economy. The springs are interchangeable and are calculated depending on the weight of the athlete. Data supplied by Enko report that the gains provided by the shock absorbers when it comes to mechanical energy is somewhere between 6% and 14% according to the pace of the athlete.

It is not apparent if the Enko footwear will likely be broadly used at this point, however, some issues have been expressed concerning the structure and how it may affect the running biomechanics.