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Re: Single leg cycling stuff [Tom A.] [ In reply to ]
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You've got a Powermeter on your skateboard?


**All of these words finding themselves together were greatly astonished and delighted for assuredly, they had never met before**
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Re: Single leg cycling stuff [Sancho] [ In reply to ]
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Sancho wrote:
You've got a Powermeter on your skateboard?

Nope...a power source




http://bikeblather.blogspot.com/
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Re: Single leg cycling stuff [Bio_McGeek] [ In reply to ]
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Bio_McGeek wrote:
Most of us tend to select something a little slower than double leg. Maybe aim for 80-85 and see how it goes.
Cheers,
Jim

I was also thinking that a fixed gear or track bike setup with a heavy flywheel might help. What sort of trainer were you using?
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Re: Single leg cycling stuff [Dreadnought] [ In reply to ]
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Dreadnought wrote:
Bio_McGeek wrote:
Most of us tend to select something a little slower than double leg. Maybe aim for 80-85 and see how it goes.
Cheers,
Jim


I was also thinking that a fixed gear or track bike setup with a heavy flywheel might help. What sort of trainer were you using?


If you did that you probably wouldn't need the pedal counterweight...interesting.

Is that why you were asking about how to "fix" a LeMond Revolution? ;-)

http://bikeblather.blogspot.com/
Last edited by: Tom A.: Mar 7, 12 15:39
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Re: Single leg cycling stuff [Tom A.] [ In reply to ]
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Tom A. wrote:

If you did that you probably wouldn't need the pedal counterweight...interesting.

Is that why you were asking about how to "fix" a LeMond Revolution? ;-)

Yes, but it is a different sensation. A track bike with a heavy flywheel will keep spinning even when you letup on the effort. I don't get that sensation with the counterweight: when I let up on the effort the counterweight drops down and quickly stops.
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Re: Single leg cycling stuff [Dreadnought] [ In reply to ]
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Dreadnought wrote:
I was also thinking that a fixed gear or track bike setup with a heavy flywheel might help. What sort of trainer were you using?
We use a Monark ergometer, but I know some teams have used them on trainers. Having a fixed gear could work but it would be pretty jerky each time the chain tension reverses direction. I suspect that after a few minutes of just pedaling with a sneaker you will find the counterweight system to be very smooth.
Cheers,
Jim
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Re: Single leg cycling stuff [Bio_McGeek] [ In reply to ]
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Andy Coggan and I got to talking about this a few years back and I had a set of weighted pedals made to do torque analysis using SRM's TA function. We made some video of the TA session:

http://www.youtube.com/...=1&v=MA6Rrv-4Vxs

The only hard part about the whole experiment was securing the weight in such a way that it would not swing or rotate about the pedal spindle. Once it was immobilized relative to the crank arm the 1-leg pedaling sensation was nearly the same as pedaling with 2 legs.


Mark Ewers
http://STLBiking.com
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Re: Single leg cycling stuff [markEwers] [ In reply to ]
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Excellent independent validation, thanks for that!
Yes the biomechanics should be about the same. The big difference is the per-leg intensity at which you can exercise. I think of it as follows: What if I could wave a magic wand and give you a 50% increase in VO2 max for your hard training sessions? You would be able to train harder and thus increase the respiratory capacity (such as capillary and mitochondrial density) in the working muscles. When you go to competition I would undo the magic spell but the increases in respiratory capacity would remain. This should (yet to be demonstrated) increase lactate threshold and thus lead to sustained performance at increased percentage of VO2 max. Stay tuned for those studies in the next couple of years with published abstracts sooner.
Cheers,
Jim
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Re: Single leg cycling stuff [Bio_McGeek] [ In reply to ]
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Hi Jim, we sent you an email about this stuff.

Thank you.
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Re: Single leg cycling stuff [Bio_McGeek] [ In reply to ]
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"Counterweighted single-leg cycling provides an exercise modality that is more tolerable than typical single-leg cycling while inducing greater peripheral stress for the same cardiovascular demand as double-leg cycling."

https://www.ncbi.nlm.nih.gov/pubmed/24492992
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Re: Single leg cycling stuff [Dreadnought] [ In reply to ]
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Dreadnought wrote:
"Counterweighted single-leg cycling provides an exercise modality that is more tolerable than typical single-leg cycling while inducing greater peripheral stress for the same cardiovascular demand as double-leg cycling."

https://www.ncbi.nlm.nih.gov/pubmed/24492992

This is an established principle in cardiac rehabilitation among physical therapists. Lately, I have been thinking more and more about it. I know there is more research on it being done on this sort of training from a performance standpoint. It makes sense, especially for long distance athletes, to try and maximize local adaptation. I also know that Jenny Rissveds did some (unknown to me how much/often, but I've been told that she was close to FTP when doing 8 min(?) intervals per leg after doing this type of training for a while) of this modality prior to her olympic gold in Rio. She already has a wicked high vo2max, in excess of 75ml/kg so trying to max out local adaptations when the central adaptations has reached a plateu seems right.

It's just a shame that it seems hard to build a proper counterweight. Seems like one has to have contacts who can build it.

Endurance coach | Physiotherapist (primary care) | Bikefitter | Swede
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