At the heart of the 625T is the IS3 Intelligent Suspension System, the result of extensive research conducted by the CYBEX Institute for Exercise Science. The 625T’s deck is soft at landing, firm in the middle, and rigid at toe off to precisely match the body mechanics of running and cushion shock on every step.With a low step-up height of 8.5” and generous 22” × 60” running surface, the 625T appeals to everyone from casual fitness members trying to shed a few pounds to avid athletes looking to push the pace.