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Newton Sir Isaac Neutral Guidance Trainer

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SKU SKU17061

Shipping Weight 3.00 lbs

Our price: $148.98

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Newton Sir/Lady Isaac Neutral Guidance Trainer

The Isaac neutral guidance trainer is designed for runners of all levels, including beginners, who are committed to Natural Running. It is ideal for runners transitioning from a heavy heel strike to a comfortable midfoot landing position. Whether you follow Chi, Pose, Evolution, barefoot running or just want to run better, the Isaac allows you to run naturally — with greater efficiency and less overuse injuries (like achilles tendonitis and plantar fasciitis). Recommended for any running distance, walking or general fitness.

What is the difference between the Isaac Trainer and the Performance Trainer? The Isaac Trainer has:

Beveled Heel and Toe: guides footstrike easily into the midfoot/forefoot
Beveled Lugs: feels smoother, more stable and gradual in the forefoot
Wider midfoot/forefoot and lugs: added stability, creating a softer feel
Midfoot Chassis/Shank: added support and stability
Carbon Rubber Outersole: increased durability
Closed Mesh on Upper: keeps small debris out

How does the Guidance Trainer differ from the Performance Trainer?

Beveled Heel and Toe: helps guide runner easily into the midfoot/forefoot
Beveled Lugs: smoother, stable feel that is more gradual in the forefoot
Wider midfoot/forefoot and lugs: adds stability and creates a softer feel
Midfoot Chassis/Shank: adds support and stability
Carbon Rubber Outersole: increases durability
Closed Mesh on Upper: keeps small debris out

UPPER

Highly breathable, fast-drying, closed mesh
Slip-proof laces with heel-securing double eyelets
Lightweight ergonomic support strapping
Metatarsal stretch panels
Reflective logo and heel tab

MIDSOLE

Single-density, high rebound EVA that stabilizes all foot types
Second generation Action/Reaction Technology™ forefoot and heel
Midfoot/rearfoot support chassis for added stability
Beveled heel and toe
Met-flex enhanced forefoot flexibility
Enhanced sock-liner that increases energy return and protection
Accommodates orthotics

OUTERSOLE

Second generation durable, high traction actuator lugs
Increased toe spring
Pronounced heel rocker
High-wear carbon rubber with traction tread

GREEN FEATURES

100% recycled laces, webbing, insole top cover
100% recycled box, packaging
10% recycled outersole rubber

ACTION/REACTION TECHNOLOGY™

The genius behind the Newton running shoes is the patented Action/Reaction Technology™. When using the ultra-efficient Land-Lever-Lift natural running gait of a midfoot or forefoot strike, the technology absorbs and then returns energy back to you. It's a revolutionary way of building a running shoe based on Sir Isaac Newton's Third Law of Motion: "For every ACTION, there is an equal and opposite REACTION."

How it Works

When your midfoot/forefoot LANDS on the ground, the technology's four external actuator lugs are pressed into hollow chambers inside the shoe's midsole via an elastic membrane (ACTION). This movement absorbs shock.

As you LEVER inside the shoe, the lugs release their stored energy and propel you forward through a burst of energetic return (REACTION) from the Action/Reaction Technology™. You then LIFT your knee and begin a new stride.

Most running shoes use various forms of air, gel, foam or plastic to counteract the foot's impact and response with the ground. But none of these materials capture and return energy like our Action/Reaction Technology™. With independent laboratory testing, 9 US Patents (other US and foreign patents pending), two Ironman World Championships, numerous world records and personal records, Newton Running shoes are superior to any other running shoe technology.

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Newton Sir Isaac Neutral Guidance Trainer