Cadence: spin or push harder
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Cadence: spin or push harder
Postby ICU812 » Sat Nov 08, 2008 7:58 pm
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Postby Mulger bill » Sat Nov 08, 2008 8:05 pm
Shaun
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Postby sogood » Sat Nov 08, 2008 8:17 pm
RK wrote:And that is Wikipedia - I can write my own definition.
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Postby Parrott » Sat Nov 08, 2008 8:27 pm
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Postby Alex Simmons/RST » Sat Nov 08, 2008 11:41 pm
Chasing cadence is a folly. Ride by effort level.
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Postby toolonglegs » Sun Nov 09, 2008 2:49 am
Todays 90k ride I did with tape over my CS200...a very hard ride on pretty flat terrain...all on perceived effort level.Yes slight difference to say the least. ...santa I need a power meter!.Alex Simmons/RST wrote:Spin a big gear.
Chasing cadence is a folly. Ride by effort level.
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Postby ICU812 » Sun Nov 09, 2008 12:12 pm
Thanks Sam
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Postby bmxbandito » Sun Nov 09, 2008 1:10 pm
PS I dont use any sort of computer I just figure if I get dropped I just should have looked at my HTFU band on my wrist more
Go the leg strength spin a big gear youll love the speed that comes with it
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Postby chris641 » Mon Nov 10, 2008 12:22 am
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Postby stryker84 » Mon Nov 10, 2008 12:41 am
Otherwise, you may indeed be going faster mashing gears, but only for a short spurt, then you'll slow drastically when the legs finally give out. I'd think you'd have a better average speed spinning over the journey.
Tip I found useful? When learning how to spin, push a given gear until you think it's time to upshift, then spin it a bit more. THEN change.
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Postby Alex Simmons/RST » Mon Nov 10, 2008 9:56 am
Cadence is an outcome of the power we are/can produce, the resistance forces acting against us and the gear we happen to be in.sogood wrote:You need to elaborate.Alex Simmons/RST wrote:Chasing cadence is a folly. Ride by effort level.
We control cadence no more than we control the torque being applied to the cranks. You cannot isolate one from the other and it is a folly to believe one can.
What we are actually able to control, physiologically, is the power we are generating. If we generate more power, all else being equal we will spin faster. Or be able to ride a bigger gear.
Hence, focus on the effort level or intensity, not the cadence.
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Postby Alex Simmons/RST » Mon Nov 10, 2008 10:07 am
The forces involved in riding even up quite steep hills are still way too low to induce changes in leg strength.chris641 wrote:If you want leg strength go up some mountains.
For example, let's say you are quite a fit cyclist capable of going sustaining 350watts up a climb.
The peak pedal forces when riding 350W at 85rpm are equivalent to lifting ~23 kg.
You'll generate significantly more force just walking up stairs with each leg lifting your own body weight.
That in itself is a poor rationale. Some pros use PEDs for instance. Does that make it good enough for you?chris641 wrote:plus the pros do it and if its good enough for them its good enough for me.
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Postby sogood » Mon Nov 10, 2008 10:08 am
I agree with what you said based on this angle. But I think the more common issue with cadence for a lot of new riders is that they just can't sustain a higher cadence, even if they have the power. And then that relates to the often touted benefits of riding at higher cadence ie. Less stress on the joints and faster recovery following an effort. Further, for a casual rider who aren't into speed and racing, preservation of knees may have a higher priority.Alex Simmons/RST wrote:Cadence is an outcome of the power we are/can produce, the resistance forces acting against us and the gear we happen to be in.
We control cadence no more than we control the torque being applied to the cranks. You cannot isolate one from the other and it is a folly to believe one can.
What we are actually able to control, physiologically, is the power we are generating. If we generate more power, all else being equal we will spin faster. Or be able to ride a bigger gear.
Hence, focus on the effort level or intensity, not the cadence.
RK wrote:And that is Wikipedia - I can write my own definition.
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Postby Alex Simmons/RST » Mon Nov 10, 2008 5:30 pm
Recovery is related to the intensity and duration you are riding at (relative to your current fitness level / training loads), and has very little to do with cadence. Unless one has a power meter and knows how hard they actually have been riding, then one is talking out their proverbial backside on that.sogood wrote:I agree with what you said based on this angle. But I think the more common issue with cadence for a lot of new riders is that they just can't sustain a higher cadence, even if they have the power. And then that relates to the often touted benefits of riding at higher cadence ie. Less stress on the joints and faster recovery following an effort. Further, for a casual rider who aren't into speed and racing, preservation of knees may have a higher priority.
People who gear down and spin faster are probably just riding at a lower overall power.
People say spinning is easier on the knees. Granted, at the same power, the average and peak forces are lower the faster one pedals, but they are already very low. I mean walking up stairs generates several times the forces involved in pedalling (even pedalling a big gear uphill).
Even slogging away at 300 watts at 50rpm is equivalent to peak forces of only approx 34 kg. That would be less than half of most people's body mass.
Doing it at 75 rpm and you're down to around 22kg equivalent peak force. At a more typical 90 rpm and you're at 19kg. So if people are getting knee problems from pushing peak forces which are the equivalent of a fraction of their body weight, then something else is wrong.
(This is also, BTW, why big gear hill work doesn't induce strength adaptations - the forces involved are far too low to induce such gains, either neurological or via hypertrophy).
I would suggest knee problems from riding are probably more due to:
- an inherit knee problem which is simply aggravated by riding
- poor bike set up
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Postby Nate » Mon Nov 10, 2008 6:01 pm
Alex makes some nice points, i.e. cadence is a result, not an input etc...
I think there's probably an average "range" thats good for a human to be in, but its probably a personal thing.
If you're a long distance marathon built person with slow twitch fibres, you're maybe a higher cadence, power sprinter - maybe a lower cadence...
I think the only real way to find your optimal range is to do a *heap* of runs, same course, time of day etc...
Cycle at different cadences (a few times), note recovery, ability to sprint etc...
and see which gives you the fastest time... surely that'll be the "best" for you right?
i sit around the 70 or so cadence to/from work
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Postby chris641 » Mon Nov 10, 2008 6:19 pm
But surely pedalling up mountains gives you more cycling specific leg strength?Alex Simmons/RST wrote:The forces involved in riding even up quite steep hills are still way too low to induce changes in leg strength.chris641 wrote:If you want leg strength go up some mountains.
chris641 wrote:plus the pros do it and if its good enough for them its good enough for me.
And no, that is a stupid thing to say. My point was that the majority of professional riders would pedal at a cadence of between 80 and 100. Obviously being professionals they would have access to all the high tech crap and be armed with the knowledge of the best way to go fast while not burning out. Yes? Maybe i should have worded it differently but I stand by the point.Alex Simmons/RST wrote:That in itself is a poor rationale. Some pros use PEDs for instance. Does that make it good enough for you?
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Postby Alex Simmons/RST » Mon Nov 10, 2008 6:40 pm
Well cycling up hils helps you get better at cycling up hills. I have no argument with that.chris641 wrote:But surely pedalling up mountains gives you more cycling specific leg strength?
However it has nothing to do with strength. Strength is defined as the maximal force generation capacity of a muscle or group of muscles. The forces when pedalling at aerobic power levels (up hill or otherwise) are simply much much lower than our maximal force generation ability, and as such as far too low to increase leg strength.
I don't think it needs fancy science to work out that people tend to gravitate towards pedalling in those cadence ranges. You just have to ride, train and race to work out that in general, pedalling at those ranges tends to be a bit more effective.chris641 wrote:And no, that is a stupid thing to say. My point was that the majority of professional riders would pedal at a cadence of between 80 and 100. Obviously being professionals they would have access to all the high tech crap and be armed with the knowledge of the best way to go fast while not burning out. Yes? Maybe i should have worded it differently but I stand by the point.
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Postby chris641 » Mon Nov 10, 2008 6:43 pm
Cheers
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Postby Alex Simmons/RST » Mon Nov 10, 2008 6:43 pm
Unless you are also measuring torque at the same time as cadence, then really you are not getting anything particularly useful from the info.
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