Feel what it is like to be a champion skier, go upto 70km/h. View the forces under your feet, green for accelerating, red for breaking. Part of my PhD thesis at Massey University (www.massey.ac.nz) into the biomechanics of alpine ski racing, view the outputs of our system Fusion Motion Capture that combines IMUs and GPS. Created by Matthew Brodie with help from Ben Griffen, Rhys Thorp, Alan Walmsley, Wyatt Page and Mt Ruapehu Alpine Lifts in New Zealand. You can find out more about the athlete Ben Griffin at www.bengriffin.co.nz
@Colorado Avalanche
17 Comments
Can you post more? Gforces, lbs/sq Inch etc…?
I will post more later this year, keep watching this space. In this run the skier reaches about 70km/h or 20 m/s see the speedometer on the RHS. His maximum G-force down this short course is 4g but on some courses 6g is reached.
For this analysis you will need to read the article I have written for the Journal 'Sports Technology'. It is to be published by Wiley-Blackwell within the next month. All the best, Matt Brodie
i would like to see more informations 😀 could u brodie ?:D
I have several videos here on you tube. I may make some more information available in a month or two.
ok, i will wait for ur update 🙂 i am really interested. Pls can u tell me where from i can get ur book, or read it ?
One purpose of this project collect data that will either prove or disprove what athletes instinctively feel makes them faster or slower. The evidence I have collected so far on moderate slopes points towards more increases in speed being possible before and at the apex of each turn by using optimal timing for the application of ski pressure.
Hi, I am really surprised to see so many people are interested in skiing biomechanics. For those of you who liked this video, I have put up another one called 'How to ski faster? Forces?' that has better graphics and shows wind drag as well as ski friction. Enjoy, Matt Brodie
Hi, thanks for the comment. Red is used to indicate that the force has a negative power or is acting against the centre of mass movement or simply speaking the force is slowing the athlete, when he skids to a stop the forces under his skis are slowing him. Sometimes there will be red forces even when he is accelerating if gravity is accelerating him more than the ski forces are slowing him. I will post some more videos soon. Matt Brodie
Ben is a great skier, his web page is in the video information. About 50 FIS points when he volunteered to help me out, now 17 for GS. There is a slight right to left cross slope, the snow was hard and icy and he was going about 75km/h. Compare this to the virtual ski cross also a run later in the day with softer snow. Momentarily diverging skis don't appear to affect performance, when pushing the limits. Possibly measurement error from ski vibrations an early FMC bug that is now fixed.
Hi, just to let you know that both New Scientist and Giz Mag have put up articles about this reserach on thier online magazines, good reading. I have also had papers recently published in the Journal of Sports Technology, the Journal of Computer Methods in Biomechanics and Biomedical Engineering, and the Journal of Applied Biomechanics if you are looking for more information.
he's turning wayyyy too late…..he's gonna miss a gate…
in other words link your turns, throw your skis back to get on the other edge early and you will carry your energy through
Hah, Ben was my roommate at one point.
I realize it's tough to demand specific conditions and have a controlled environment, but it would be interesting to see how data differs with the angle of the slope and the different types of conditions.
how did you make this?
how did you make this?
btw i go harder than 70 km/h 😉
kinda looks like ted