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ERGdata app - What is "Drive time", please
Posted: January 29th, 2021, 4:29 pm
by Soulsurfer
Can someone please explain this factor of drive time/sec? I have no clue. Thank you.
Re: ERGdata app - What is "Drive time", please
Posted: January 29th, 2021, 8:37 pm
by Tsnor
Soulsurfer wrote: ↑January 29th, 2021, 4:29 pm
Can someone please explain this factor of drive time/sec? I have no clue. Thank you.
Concept2 says "What is Drive Time?
Drive time is measured by the amount of time the flywheel is accelerating. Note: It is possible that the athlete may pull on the handle and not accelerate the flywheel due to no energy being put into it and therefore no effective effort. This portion of the handle pull is not measured." here:
https://www.concept2.com/service/software/ergdata/faqs
Not sure how to use this field to help you row better or get a better workout.
At one time I thought it could be used as "if you were trying to spent 2X the time on recovery vs drive you could use this field to help you keep that ratio for a given stroke rating" however there are some counting problems with moving the handle fast enough to catch up to a spinning flywheel so you would need to calibrate somehow. Since ergdata does not capture this field with the rest of the data it sends to the C2 log, and I cant think that hard when I am rowing I don't use it.
(I do use the "Drive Length" field a lot (along with the force curve) to see when my rowing form falls apart. Wish drive length was captured.)
Re: ERGdata app - What is "Drive time", please
Posted: January 29th, 2021, 9:18 pm
by Soulsurfer
Tsnor wrote: ↑January 29th, 2021, 8:37 pm
Soulsurfer wrote: ↑January 29th, 2021, 4:29 pm
Can someone please explain this factor of drive time/sec? I have no clue. Thank you.
Concept2 says "What is Drive Time?
Drive time is measured by the amount of time the flywheel is accelerating. Note: It is possible that the athlete may pull on the handle and not accelerate the flywheel due to no energy being put into it and therefore no effective effort. This portion of the handle pull is not measured." here:
https://www.concept2.com/service/software/ergdata/faqs
Not sure how to use this field to help you row better or get a better workout.
At one time I thought it could be used as "if you were trying to spent 2X the time on recovery vs drive you could use this field to help you keep that ratio for a given stroke rating" however there are some counting problems with moving the handle fast enough to catch up to a spinning flywheel so you would need to calibrate somehow. Since ergdata does not capture this field with the rest of the data it sends to the C2 log, and I cant think that hard when I am rowing I don't use it.
(I do use the "Drive Length" field a lot (along with the force curve) to see when my rowing form falls apart. Wish drive length was captured.)
THANK YOU! wow, what a great explanation! I am just getting back into and form is key to be effective and avoid injuries as well.
Re: ERGdata app - What is "Drive time", please
Posted: January 30th, 2021, 2:16 am
by mict450
Soulsurfer wrote: ↑January 29th, 2021, 9:18 pm
I am just getting back into and form is key to be effective and avoid injuries as well.
With those goals, I think you would be better off monitoring the power/force curve.
Also, if you could monitor your stroke in real-time & save the video for later in-depth analysis. I'm trying to figure out a way to do this without it costing an arm & a leg.
Re: ERGdata app - What is "Drive time", please
Posted: January 30th, 2021, 4:02 am
by hjs
Drivetime must be seen in context. Strokelenght, the longer stroke, the more time.
Drag, the higher drag, the slower stroke, the longer drivetime. But not pace! That could be faster or slower.
Pace, given a fixed drag, the faster the pace, the shorter the drive time.
Slack, or connecting to the flywheel, again, close connected to drag. The less slack, longer drivetime.
So in itself, drive time says nothing.