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PowerCranks Study
This from Frank Day's recent Newsletter...
[The first criticisms I heard about the PC's came from those who said "well, if they are so good, why aren't the top cyclists using them?" Well, that argument became easy to rebut in the last year or so. But, the other criticism has been that "there has been no study proving the worth of the cranks and substantiating the claims." Well, I am glad to report that drought is about to end. I have been informed (and have seen the galleys) that the first study of training effectiveness in trained cyclists is to be published in November. I must say, based upon the study design, I would not have predicted the magnitude of the benefits they found. But, I shouldn't say more until it is published. I will, of course, put a link to the study once it is available.] I'll look forward to reading the publishing and debating this a little more. Phil Holman |
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PowerCranks Study
Phil Holman writes:
This from Frank Day's recent Newsletter... # The first criticisms I heard about the PC's came from those who said # "well, if they are so good, why aren't the top cyclists using them?" # Well, that argument became easy to rebut in the last year or so. # But, the other criticism has been that "there has been no study # proving the worth of the cranks and substantiating the claims." # Well, I am glad to report that drought is about to end. I have been # informed (and have seen the galleys) that the first study of # training effectiveness in trained cyclists is to be published in # November. I must say, based upon the study design, I would not have # predicted the magnitude of the benefits they found. But, I # shouldn't say more until it is published. I will, of course, put a # link to the study once it is available. I'll look forward to reading the publishing and debating this a little more. This sounds more like a book promotion than a report on the cranks. Barkers at circus sideshows show more than this lead-on. How can you repeat such jive? By the way, remind me of the principal behind PC's. Are these the cranks that do not come around by themselves and require pulling up to make them remain synchronous (180 degrees apart)? Jobst Brandt |
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PowerCranks Study
wrote in message ... Phil Holman writes: This from Frank Day's recent Newsletter... # The first criticisms I heard about the PC's came from those who said # "well, if they are so good, why aren't the top cyclists using them?" # Well, that argument became easy to rebut in the last year or so. # But, the other criticism has been that "there has been no study # proving the worth of the cranks and substantiating the claims." # Well, I am glad to report that drought is about to end. I have been # informed (and have seen the galleys) that the first study of # training effectiveness in trained cyclists is to be published in # November. I must say, based upon the study design, I would not have # predicted the magnitude of the benefits they found. But, I # shouldn't say more until it is published. I will, of course, put a # link to the study once it is available. I'll look forward to reading the publishing and debating this a little more. This sounds more like a book promotion than a report on the cranks. Barkers at circus sideshows show more than this lead-on. How can you repeat such jive? By the way, remind me of the principal behind PC's. Are these the cranks that do not come around by themselves and require pulling up to make them remain synchronous (180 degrees apart)? Yes, that's correct Jobst. Reading between the lines of the newsletter, it looks like the study will reveal that training with the cranks will increase power output by 'x' amount. This might be a little more newsworthy than the umpteenth thread on shimmy but that's just my opinion. We'll just have to wait and see. Phil Holman |
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PowerCranks Study
Phil Holman writes:
This sounds more like a book promotion than a report on the cranks. Barkers at circus sideshows show more than this lead-on. How can you repeat such jive? By the way, remind me of the principal behind PC's. Are these the cranks that do not come around by themselves and require pulling up to make them remain synchronous (180 degrees apart)? Yes, that's correct Jobst. Reading between the lines of the newsletter, it looks like the study will reveal that training with the cranks will increase power output by 'x' amount. This might be a little more newsworthy than the umpteenth thread on shimmy but that's just my opinion. We'll just have to wait and see. There is no doubt that adding the effect of lifting (actually pulling back, lifting and pushing forward over the top will impart more power to cranks, however, it will not produce more power from the rider for a given aerobic level. Quite to the contrary. Engaging more muscles in propelling the bicycle burdens the heart and lungs with the overhead of more muscles rather than using the principal ones that are naturally used. If this were not so, foot plus hand cranks would produce a greater speed in TT's, flat and hill climbs, but they don't. Anyone who has not trained with these cranks cannot ride with them, the requirement to keep positive forward torque on both cranks throughout rotation is difficult to accomplish. I'm sure that Lance Armstrong could not ride rollers with these at the bicycle show, something no bicycle racer I saw at InterBike 2002 do. If these cranks did what they claim to do, we wouldn't see riders dominate in races against PowerCrank devotees. Let's not overlook that with conventional cranks, the feet an legs are balanced and that it take no effort to rotate the cranks forward, clipped in and with non chain. With Power Cranks, this takes considerable effort, the feet not balancing each other. The limit of climbing hills or flat TT depends on aerobic capacity. That is what good bicycle racers have that others don't. Jobst Brandt |
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PowerCranks Study
On Sun, 05 Oct 2003 03:49:50 GMT,
wrote: Anyone who has not trained with these cranks cannot ride with them, the requirement to keep positive forward torque on both cranks throughout rotation is difficult to accomplish. That's the point. These cranks are not marketed as being faster than normal cranks. They are marketed as a training tool, so that when a rider who uses them a lot rides on a bike with normal cranks, he/she will be more powerful. I'm not sure I believe that though. JT ******************************************* NB: reply-to address is munged Visit http://www.jt10000.com ******************************************* |
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RE/
Engaging more muscles in propelling the bicycle burdens the heart and lungs with the overhead of more muscles rather than using the principal ones that are naturally used. Does that supply me with a rationale to not learn how to spin? -- PeteCresswell |
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RE/
Rowers combine arm and leg power to improve performance and it does not burden their heart and lungs. I'm not much of a rower - but I did belong to one of the local barge clubs for a couple years and have *lots* of hours on a Concept II rowing ergometer. I would disagree with the idea that rowing uses the arms for anything but connectors. For me, at least, rowing is a series of dead lifts. Virtually no arm effort is involved besides hanging on to the oars hard enough to transfer power. -- PeteCresswell |
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