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2011-10-21 1:22 PM

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Subject: Powercranks
Now that my season is over, I am thinking about getting some Powercranks for my road bike which I will using on my indoor trainer through the fall and winter to work on my pedaling efficiency.  I hear when you first get the powercranks you will only be able to spin a few minutes before you are done for that day and slowly over time you are able to build up your workout times.  If you have used Powercranks what has your experience been and how did it utlimatley impact your bike and run splits?


2011-10-21 2:26 PM
in reply to: #3733391

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Champion
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Tacoma, Washington
Subject: RE: Powercranks

I've used them. In fact, I got a "free" set to use for a year, and I got them mainly so that I could transition back into running after foot surgery. Or more properly, not lose as much run fitness.

Yes, they'll kick your a$$ handily. I never got to where I could just go an hour on them without needing a break. I'd have to stand up, give myself a short rest, and then keep going. I think the record for doing a century on them is two weeks after receiving them (by Tim-the-Nurse of the old TNO forum, and he rode almost exclusively on a fixie).

I did notice that it seemed I was putting a lot more pressure on the saddle. YMMV.

And one tip -- DON'T try to use them on a Softride.



Edited by briderdt 2011-10-21 2:27 PM
2011-10-21 2:30 PM
in reply to: #3733391

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Elite
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Laguna Beach
Subject: RE: Powercranks

I am a huge fan of PowerCranks and I am convinced the benefits are substantial. They helped my running also.

Perhaps the greatest endorsement is that I leant them to a buddy of mine who did 9 Tours de France and her kept them...  Yell

2011-10-21 2:39 PM
in reply to: #3733391

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Champion
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Montague Gold Mines, Nova Scotia
Subject: RE: Powercranks
I would not suggest investing in a set of PowerCranks; beyond n=1 there is nothing to indicate that they work and every attempt to quantify improvements has been unable to do so.

If you want to learn more about PowerCranks and the attempts to show gains, head over to SlowTwitch and search for Powercranks and/or Frank Day. Then settle in for the evening and enjoy

Shane
2011-10-21 2:55 PM
in reply to: #3733550

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Champion
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Knoxville area
Subject: RE: Powercranks

gsmacleod - 2011-10-21 3:39 PM I would not suggest investing in a set of PowerCranks; beyond n=1 there is nothing to indicate that they work and every attempt to quantify improvements has been unable to do so. If you want to learn more about PowerCranks and the attempts to show gains, head over to SlowTwitch and search for Powercranks and/or Frank Day. Then settle in for the evening and enjoy Shane

 

I wish I still had the picture of the Cat yelling "POOOOWWWWEEEERRRRCRRRAAAANNNNKKKKSSSS!!!!!"

2011-10-22 10:22 AM
in reply to: #3733391

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NH
Subject: RE: Powercranks
Are these more than just a way to do one legged pedaling?  I'd never heard of powercranks and that's what I can glean from the website.


2011-10-23 4:36 AM
in reply to: #3733391

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Veteran
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Indianapolis
Subject: RE: Powercranks
I've been using them for years.

Despite be marketed as a biking tool, they will do wonders for your running. Most of the people that are bashing them generally don't like the claims that the owner throws out there or have never used them for any amount of time. I won't comment on that but I will repeat that they will improve your running tremendously.

Jamie
2011-10-23 6:51 AM
in reply to: #3734744

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Champion
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Montague Gold Mines, Nova Scotia
Subject: RE: Powercranks
jamiej - 2011-10-23 6:36 AM

Most of the people that are bashing them generally don't like the claims that the owner throws out there or have never used them for any amount of time.


I definitely do not like the Frank Day style of marketing, especially when there is nothing to back up the amazing claims. It is classic snake oil salesmanship at its best (or worst depending on how you look at it).

However, my skeptism comes not from my dislike of his approach but from the complete lack of evidence for the effiacy of independant cranks. Even the scientific studies that are posted on the website refute the idea of one legged cycling providing any benefit to cycling performance but he either doesn't get that or thinks that the average user will simply assume the stideis support his product. Further, everytime there has been someone who has had a breakthrough with PowerCranks and has tried to show this, there has been some issue (not showing up for the race, being sick, faked power files) and when there is little to no improvement, it is always the users fault. I have no doubt that cycling on PowerCranks is hard but then again, so is riding at FTP for an hour or cycling up a hill at 10% for several minutes; the difference is that I don't need to spend ~$1000 to do those. I also have no doubt that they might provide marginal run benefits; again, most triathletes just need to run more which they can do for free.

I won't comment on that but I will repeat that they will improve your running tremendously.


No you wouldn't comment on it; just point it out so as to descredit anyone who doesn't believe the evidence indicates the cranks don't work.

Shane
2011-10-23 7:05 AM
in reply to: #3734744

Subject: ...
This user's post has been ignored.

Edited by Fred D 2011-10-23 7:23 AM
2011-10-23 9:23 AM
in reply to: #3734744

Veteran
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Indianapolis
Subject: RE: Powercranks
JFC. Sorry I offended your collective sensibilities. Let me rephrase it a bit more clearly:

I believe that they are a better tool for running than cycling.

Is that better?

2011-10-23 6:08 PM
in reply to: #3734763


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Subject: RE: Powercranks
gsmacleod - 2011-10-23 4:51 AMFurther, everytime there has been someone who has had a breakthrough with PowerCranks and has tried to show this, there has been some issue (not showing up for the race, being sick, faked power files)
That's both sad and thought-provoking.


2011-10-23 6:33 PM
in reply to: #3733391

Extreme Veteran
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West Michigan
Subject: RE: Powercranks
never head of them. Went to the website and felt like I took a time machine back to the invention of the internet.  He definitely needs to hire marketing person and a web person.  The website does not build consumer confidence.  
2011-10-25 6:33 AM
in reply to: #3733391

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Subject: RE: Powercranks
Thanks for all the input. This is what I take away from the posts.  If you have used Powercranks you felt they were benefical with either your biking or running but you do not quantify your  improvements.  If you have not used them you state their is no scientific proof that Powercranks will improve your performance in either biking or running.  What I would like to hear from are individuals that have used them and if they have or have not seen any race performance improvements.  Please comment on how long you used them and quantify your improvements.    
2011-10-25 7:02 AM
in reply to: #3736909

Champion
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Montague Gold Mines, Nova Scotia
Subject: RE: Powercranks
jcscharer - 2011-10-25 8:33 AM

What I would like to hear from are individuals that have used them and if they have or have not seen any race performance improvements.  Please comment on how long you used them and quantify your improvements.


You realize that you are setting up a huge bias in your sample and this will in no way help you make an informed decision as to whether to spend ~$1000 on this product.

Shane
2011-10-25 7:04 AM
in reply to: #3733391

Champion
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Columbia, South Carolina
Subject: RE: Powercranks

It's going to be pretty hard for any single person to quantify improvements due to PC in any convincing way.  When your study is N=1, there's no control.  That's why people are suggesting that the convincing evidence should be in the form of a proper study.  (I've got nothing against people saying "I think they helped me" -- that's great.  I just don't find it to constitute a reason to think that they'd help me.

2011-10-25 7:17 AM
in reply to: #3736928

Expert
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Cape Elizabeth, Maine
Subject: RE: Powercranks

Here is my opinion...I bought a pair of ebay for $500 bucks and tried, kept them for 3 years.   I used them sporadically and they were very challenging to master.   Over time  I learned to ride them on the trainer only in the winter.  It showed some weaknesses in my cycling stoke and revealed some major imbalances that I knew were there and I think it help make me stronger - but I can't point to actual increased speed improvement (a lot of this is my own fault, not training enough or consistently).   

PC are a tool in your tool box.   While I don't think they are a magic bullet to turn you into a great cyclist I do believe that if you use the tool and you ride more you will improve.   Really this is the same for any tool - a HR monitor, a computrainer, etc...they are tools, but at the end of the day you still have to do the work.

The beauty of most of these tools, you can try them, use them and then sell them...I sold my Powercranks on EBay for $380, so for three years I got to use them for $120, a say it was a good investment.



2011-10-25 12:20 PM
in reply to: #3733391

Subject: ...
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2011-10-25 12:56 PM
in reply to: #3735169

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Subject: RE: Powercranks

guppie58 - 2011-10-23 7:33 PM never head of them. Went to the website and felt like I took a time machine back to the invention of the internet.  He definitely needs to hire marketing person and a web person.  The website does not build consumer confidence.  

x10000000

Seriously. That's awful.



Edited by ratherbeswimming 2011-10-25 12:57 PM
2011-10-25 4:07 PM
in reply to: #3736909


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Subject: RE: Powercranks

jcscharer - 2011-10-25 4:33 AM  What I would like to hear from are individuals that have used them and if they have or have not seen any race performance improvements.  Please comment on how long you used them and quantify your improvements.    

Read the entire year-long series of posts. He had about 5 years of power data before he got PCs. He used them for a year and got no improvement. Frank Day explained that was because James hadn't used them "exclusively" (James rode a regular crank for races and usually for his weekly hammerfest ride).

http://james-p-smith.blogspot.com/2009/08/powercranks-final-verdict.html

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