Concept2 Forum

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Slothful1 wrote: ↑

July 22nd, 2019, 5:45 pm

I couldn't decide what I should do for training tonight ........ < snipped>

Dave

Code: Select all

DF	Cadence		Watts

46	60		47

108	60		114

170	60		180

.............. a question if I may ............ am currently using an old erg until I can get a BikeErg and although am comfortable with what the rowing machine flywheel does , I cannot quite wrap my head around the C2 BikeErg.

(Rowing machine 6+Million metres, DF usually 120 ...... 2k 7:10, 10k approx 38:00, 5k approx 18:00, 1 hour approx 15100)

For the above 3 examples of Cadence and DF and Watts, assuming 2 minutes at each setting, does the BikeErg report different speeds and different distances for the 2 minutes ?

My very old machine reports the same speed for the same cadence at different resistance levels, it is simply far more difficult to turn the pedals over at greater resistance levels.

The reason I used the low DF on the rowing machine was to train my legs to push quickly to "catch up" to the spinning wheel and apply some force, but it seems to me that won't really apply on the BikeErg with at least one leg applying force to the flywheel all the time.

Bill

Hi BIll

I didn't write down the additional info, but more watts should translate into a higher speed on the PM5, and also a longer distance for 2 minutes. The PM5 uses a non-linear formula to translate the watts into pace, which holds regardless of the drag factor.

On your old bike, it's probably determining speed from revolutions of the flywheel, but the PM5's speed relationship to flywheel revs is more sophisticated (drag factor and wheel revs are used to calculate the power, which then goes into the non-linear pace formula).

Dave

Thankyou Dave for the comprehensive initial report and the above reply. I understand things a bit better now.