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gwoolman44
12-01-2004, 02:34 PM
Hello All,



Re: Snowboarding research



I was forwarded a snowboarding information request and thought that I may be
able to contribute.

We have been using an electromagnetic system to measure foot and ankle
motion inside a snowboard boot for the past 4 years. This has been in
collaboration with the University of Otago, School of Physical Education. It
was originally research as a part of my Masters degree however it has
progressed slowly although we have not published anything as yet.



We initially measured simulated (lab controlled) snowboard landings using
soft and hard boot types and also different fall angles. From this we were
able to determine potentially injurious movements that may contribute to
injury, notably fractures to the lateral process of the talus or
"snowboarders ankle". As well as this we measured in boot plantar foot
pressures using Tekscan. These results were presented at the last 2
International Society of Ski Trauma and Safety conferences in Queenstown and
St Moritz. Using this motion tracking equipment we considered the sensors
were an appropriate and accurate way of measuring subtle movements inside
the boot.



Following this we performed a pilot last year on the same system made semi
wireless and had the snowboarder ride with a pc and motion capture unit on
his back. Thus we were able to measure 3D motion whilst snowboarding and
performing several jumps. This proved successful and interesting results
were obtained particularly with respect to rotational angular velocity
around the ankle.



This year we have recently completed a larger study using the same
methodology and compared two different boot types amongst several subjects.
This type of research is very difficult and we underestimated the time
required for each trial. Nonetheless we now have a large data set and using
Skill Techologies 6DR software are able to also measure other interesting
variables such as angular velocity, accelerations, and displacements (i.e.
foot movement inside the boot - heel slippage is a real issue for
snowboarders).



We now have simulated landing ranges of motion to compare with our field
testing and certainly the results are interesting. We are presenting these
results in Japan next April at the ISSS conference.



The next step is to develop a computerised testing system so that
manufacturers can test boots inside of a jig that will flex the boot in a
way that mimics the slalom manoeuvres that we have derived our results from.
Thus they can get repeated and accurate flexions over time to determine boot
deformation etc.



We have a wealth of information on virtually every published snowboarding
article up until now (sorry English only). If anyone needs advise or help
then I am prepared to lend a hand given we have learnt so much over the
past.

5 years.



Kind regards



Greg Woolman

Sports Podiatrist

Dip Pod, PG Dip Sportsmed, MHSc







Sportsmed

156 Bealey Ave

Christchurch

New Zealand



*+64 33660-620

*+64 33550-668

mobile 021 357522

email sportspod@xtra.co.nz

___________________________________________




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