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comment What's the lowest safe cadence on a climb?
@DanielRHicks: you're right that max pedal force isn't constant across all cyclists but the classic dataset collected by Kautz (isbweb.org/data/kautz, or anonymous.coward.free.fr/rbr/kautz.png) shows that max pedal force is roughly twice avg. pedal force (in the Kautz data, max is 1.85x avg), whence the rule of thumb cited above. This has been verified by more recent pedal-based power meters like the Garmin Vector.
5h
comment What's the lowest safe cadence on a climb?
It's easy to calculate the maximum force at the pedal but it's hard to calculate the "safe" force at the knee since that depends on your knee. A reasonable rule of thumb is that max pedal force is around 12*watts/rpm, and that applies whether riding on the flat, gentle climbs, or brutal climbs. Of course, on brutal climbs you'll need the right gearing to keep your power down -- with your current gearing up a 15% slope your power at 90 rpm wouldn't be 225 watts.
1d
comment What's the lowest safe cadence on a climb?
BTW, from the information given in your question, it appears your max pedal force will be around three-quarters of your body mass (i.e., less than your body mass).
1d
revised What is the optimal cadence?
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1d
comment What's the lowest safe cadence on a climb?
Does the section labeled "Cadence and knee strain" in this bicycles.stackexchange answer address your question? bicycles.stackexchange.com/questions/12518/…
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awarded  Nice Answer
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comment How do I train for climbing in a relatively flat area?
There is insufficient information to give a good answer. Are you trying to race up these climbs, or are you just trying to survive up these climbs? How long and how steep are the most difficult climbs you anticipate doing? Will you be riding with others with whom you're trying to keep up, or can you set your own pace?
Jul
12
comment When Mark Cavendish says he's sprints at 1500 watts how long is that for?
Cavendish was the subject of Menaspa's 2013 article in IJSPP so it is particularly on point for this question.
Jul
11
revised Analysis of Stages high-speed data
linked to Kautz pedaling data showing one torque peak per revolution
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reviewed Approve suggested edit on Shifters compatible with: SG-3D55 (Shimano Nexus 3 speed - disk brake - internal gear hub)
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awarded  Informed
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comment Analysis of Stages high-speed data
Welcome to bicycles.stackexchange, Andy.
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revised Analysis of Stages high-speed data
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revised Analysis of Stages high-speed data
Describe why exact crank angle is unneeded, and describe algorithm to find peaks.
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revised Analysis of Stages high-speed data
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comment Analysis of Stages high-speed data
@Oscar The negative parts do reflect counter-acting torque but it appears dbr may have been coasting at the time rather than pedaling. I included the calculation just to show the anomaly. If I were were doing this in "production mode" I would almost certainly record that as zero power, and tine-tune the analytical algorithm to produce average power over a second rather than over a crank revolution.
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revised Analysis of Stages high-speed data
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answered Analysis of Stages high-speed data
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comment What is the effect of changing length of crank arms?
It's been studied quite a bit but usually from the perspective of muscle shortening speed so searching for "crank length" won't always find the right studies. But perhaps this little empirical experiment is closer to what you had in mind: bikeblather.blogspot.fr/2014/07/…
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comment Analysis of Stages high-speed data
He may not have pedal angle but he does have a timestamp and thus elapsed time between peaks of the force or torque curve. Since the Stages only measures forces on the left crank, you could integrate over the cycle and do what Stages does: double it to get total power. If you were obsessive, you could do what has been proposed elsewhere: use the difference in trough-to-peak time to peak-to-trough time as an estimate of L/R balance to get a refined estimate of total power.