Sweetspot heart rate

A light bike doesn't replace good fitness.

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TobinHatesYou
Posts: 12444
Joined: Mon Jul 24, 2017 12:02 pm

by TobinHatesYou

Power meter footpods for runners are literally worthless. Stride efficiency is highly variable from step to step, and the pods from different manufacturers all report different numbers. You are simply better off pacing your runs off HR...unlike cycling where you can mostly ignore your HR until you really are suffering above LTHR when you normally wouldn’t be.

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mikemelbrooks
Posts: 345
Joined: Wed Jun 16, 2010 10:58 pm

by mikemelbrooks

TobinHatesYou wrote:
Sun Jan 06, 2019 1:17 am
Power meter footpods for runners are literally worthless. Stride efficiency is highly variable from step to step, and the pods from different manufacturers all report different numbers. You are simply better off pacing your runs off HR...unlike cycling where you can mostly ignore your HR until you really are suffering above LTHR when you normally wouldn’t be.
While I agree about footpods, if you think about it the power you put out while cycling varies during each pedal stroke as you travel through the dead spots.

TobinHatesYou
Posts: 12444
Joined: Mon Jul 24, 2017 12:02 pm

by TobinHatesYou

No? Power meters measure torque many times per second. That accounts for deadspots in your pedaling. If this were a real problem, you would see obvious differences in power measurement between hub based power sources like PowerTaps and smart trainers vs pedals. I have run 3 PMs including hubs/trainers concurrently and they are usually within a couple watts of each other.

Some power meters even measure angular velocity many times per second, allowing for non-round chainring use. Since most of us do use round chainrings, simply averaging the torque per revolution is sufficient.

Here is a 3h12m mostly Z2 trainer session. Look at how close the pedals are to the spider are to the hub/trainer. The only reason why the peak watts are different is due to filtering / 1s recording on the bike computers used.

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