Fanken, trodde stark på 117-gradersidén... men hittade det här från en till synes initierad källa. Hela tråden finns här:
http://www.timetriallingforum.co.uk/?showtopic=86909
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Xav, have you ever tried the osymetrics in a different orientation from that advised?
I.e. the 117% orientation as described in this article?
http://www.google.co....62922401,d.d2k
I tried it this morning and wasnt able to test it properly on the turbo (Kurt kinetic) as every time I applied power the wheel slipped! Even with the pro flywheel off and the wheel tightened down 2 turns more than usual. My guess was that with this position the acceleration is so great then it keeps slipping, could this be a good indicator? The road will tell me later!
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#25 Xavier
Lo-Pro + tri
Advanced
5818 posts
Posted 21 March 2014 - 08:35 AM
If you mean like this:
The Belgian website claims that it provides almost identical benefits to the traditional position, which IMO rings alarm bells about their model and how they're assuming muscles are recruited during the pedal stroke.It's compounded by the fact that they base almost their entire analysis on this statement:
"As a consequence a circular chainring has a constant angular velocity of the crank throughout one revolution."
Nope!!! They estimate crank velocity by assuming a constant input over the course of the entire pedal cycle, which we know is incorrect, and then use inverse dynamics to calculate joint loads at various points. So their original starting point is flawed (which they should have known if they'd done a literature search ...)
Xav "
