Wednesday, February 17, 2010

Bike Fit using Video Motion Analysis Dartfish


Many injuries that occur as a result of ridding a bike can be traced back to poor bike positioning.
The first step to correcting a problem or gaining some watts on the bike is with a proper bike fit. There are many schools of thought and methods but I feel that SICI ( Serotta International Cycling Institute) has the best methods, training staff and the ability to know its reproducible. Using Video to analyze motion has been around for years the first exposure I had was working with Dr. Robert Roe a chiropractor that had worked at the Olympic training center in Colorado in the early 90 using a much more cumbersome and primitive form of analysis. At that time we were using it to evaluate work loads on patients. Now I have been using Dart fish to analyze bio-mechanics of all types of athletes. At SICI we trained using there fitting principles and High Def cameras to evaluate motion down to the smallest detail. It is a more dynamic fitting process that can breakdown movement to a much higher degree. When you add power and HR data things get even more interesting. The amount of information and precision is really remarkable. I have added a video of a fit I did in Northern Virginia of a Pro cyclist that is having a few problems even after several Bike fits by other professionals.


video

This is an example of a marker that was placed on his right leg that is short when compared to the left and is not tracking properly. The patient feels like his right leg is wobbly and dives in medialy on the power stoke. He notes hitting the top tube. I will also let you know that after the exam I also found very specific weak core strength that needed to be address. Using this software and combining that my physical exam finding I am able to find a new starting point to make small adjustments until the correct fit is obtained.

Dr. Rick Rosa
Fairfax & Alexandria VA
703-876-5600



4 comments:

オテモヤン said...
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Air Jordans said...

Thanks for adding the new information, as well as your analysis. This is why your blog is one of the few I read that I also ever bother to comment on. I don't do it to hear myself talk - I do it because I know you actually listen.

Retro Jordan said...

I have been reading the posts avidly so just wanted to express my thanks for providing me with some very good reading material. I look forward to more, and taking a more active part in the discussions here.

Scott said...

I love the use of Dartfish on a bike. As a performance coach and a recreational mountain bikers, I really appreciate your use of this.