boot board ramp angle

NABOSO: FIRST SKI TEST RESULTS

I finally got a chance to test Dr. Emily Splichal’s surface science small nerve stimulating NABOSO insoles (1.)

Naboso (meaning “barefoot” in Czech) is the first-ever small nerve proprioceptive material commercially available in the health and fitness industry. The skin on the bottom of the foot contains thousands of (small nerve) proprioceptors, which are sensitive to different stimuli including texture, vibration, skin stretch, deep …

As I typically do, I used a one on one test protocol with a NABOSO 1.5 insole in my left ski boot and my normal insole in my right boot. The results were nothing short of amazing. There was almost no difference in the feeling under the sole of my left (NABOSO) foot compared to the sole of my right (normal insole) foot. The NABOSO Effect (as I call it) in my left ski boot was nothing like the effect I experience in similar tests in my Xero Prios or Lems Primal 2 minimal shoes. You’re probably wondering why I was amazed if NABOSO was no better than my normal insoles. The fact that I felt little difference told me that something was seriously wrong with my ski boots.

The first thing I suspected was that there was too much ramp angle (aka zeppa) in the boot boards in my Head 335 World Cup boots. I can’t recall what the factory ramp angle. But I lowered the heel a lot and the reduced ramp angle seemed to work well compared to the original ramp angle. As a reference, the boot board zeppa angle in the Head RD boot is 4.0 according to Head literature. The zeppa in recreational ski boots can be as much as 7 degrees. Since 1978, I have known that too much boot board ramp angle can cause significant balance and ski control issues for skiers. But I had no way of accurately determining what the optimal zeppa angle should be. What appears to work well for one skier does not necessarily work for another skier. Zeppa is a crap shoot, a good guess, a lottery. A few skiers win the zeppa lottery. But most skiers lose. I decided that I had to find an accurate way to determine the optimal personal zeppa angle for skiers and especially racers.

Necessity is the mother of invention.

I had a need to know situation. In my next post I will describe the Dynamic Ramp Angle assessment  device that I designed and fabricated and the incredible results that happen when zeppa angle is in the optimal range and the NABOSO Effect kicks in. Prepare to be shocked by the results. I was. I am still in shock. If the results hold up, optimal boot board ramp angle will be a big miss for the ski industry.


  1. http://nabosotechnology.com