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The Lady 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 Lady 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

For new customers, our shoes tend to fit smaller that many common running shoes. With every shoe there is anadjustment period.


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


  • Single-density, high rebound EVA
  • Second generation Action/Reaction Technology™forefoot and heel
  • Midfoot 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


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


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



  1. Denise McQuade
    September 19, 2014 @ 6:39 am

    What shoe replaces the Lady Isaac? This is the only shoe I have found that helps prevent achilles tendonitis. My running store suggested Gravity, but it’s not the same for me. After running in them for a few weeks, I am not having arch pain. I am searching the web for size 8 Lady Isaacs, but running out of options. THanks.

  2. Cindy
    October 30, 2014 @ 9:10 am

    I fell in love with this shoe the minute I put it on. I’m now ready for a new pair, but I can’t find them!!! I don’t even see them on your site. Which shoe on your current line-up is most similar?

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