The technology is based on Sir Isaac Newton's Third Law of Motion: "For every Action, there is an equal and opposite reaction." You see the large lugs act as levers and shock absorbers that return energy back to you as you run. The key to the Newton is that you land with a midfoot or forefoot strike instead of landing on the heel first. Newton calls this a Land-Lever-Lift motion. This causes continuous muscle activation instead of a start/stop action that's caused by the breaking effect when you heel strike.
I've tend to have more of a midfoot strike, so adjusting to the Newton's did not take very long. But Newton does a great job of letting new Newton runners know that they should ease into running in their Newtons, especially if they've been a heel striker. You'll be activating some muscles that you may not have used much when heel striking or you may just be using them in a slightly different way. Anytime you recruit new muscle activation, there's a period of acclimation. Newton recommends not running more than about 1.5 miles in your new shoes the first time. Then you should gradually add a little more mileage with each run. Also, be aware that Newtons tend to run about a 1/2-size smaller than your regular running shoe. So, for example, if you normally wear a 9.5, it's probably a good idea to order a 10 in a Newton.
The only negative I have to say about the shoe is the expense. The Neutral Performance Trainers that I tested sell for $175. About $75 more than what I pay for my traditional running shoes. But, I guess if you factor in the fact that Newtons may prevent running-related injuries down the road, maybe that savings in medical expense is the worth the extra money.
The video below shows Newton Running founder Danny Abshire as he demonstrates the finer points of forefoot running: proper athletic position; finding your sweet spot; the difference between walking stride, jogging stride, efficiency running and sprinting; and using the Land, Lever, Lift technique to perfect your form.
If you live in the Triad area (Greensboro, High Point, Winston-Salem, NC) then check out a pair of Newtons at our awesome local running store Off'n Running Sports located at 2201 Joan Ave in Greensboro (just off Lawndale). This Tuesday (October 5th) from 6-8PM will be Newton Night at Off'n Running. A Newton rep will be at the store to teach you about Newton shoes and how to run in them. Participants in Newton Night will receive a 15% discount on Newton shoes!! I told you Off'n Running Sports was great!
Note: Although Newton Running sent me a pair of the Gravity shoes and asked me to test and review the shoes, I was in no way urged to write a positive reveiw, nor was I paid or compensated in any other way for writing the reveiw. My review is purely based on my own personal experience using the product.