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spin class conversion to mph?

cindysue2010-05-02 18:35:47 +0000 #1
if you were logging miles for your spin class, how many miles would you estimate for a one hour advanced spin class?

It's hard to figure what all that high cadence (100-120) plus intermediate cadence (75-90) adds up to. what's the conversion of cadence to mph?
Veronica2010-05-02 18:42:17 +0000 #2
Personally, I count indoor rides as time not mileage. I'm not going anywhere after all. That's why when you look at my bike journal, you don't see the many hours I've put in with Coach Troy lately.

However, if I were to count it, I'd go with whatever pace I know I could sustain for an hour on the flat.

DeniseGoldberg2010-05-02 19:25:44 +0000 #3
I'm with V. on this one. I only count mileage on my bike on the road. And I log any indoor training in hours.

Based on other discussions, there do seem to be quite a few folks here who count their "miles" on their indoor trainer though, and I think Veronica's idea for estimating miles is a good one.

--- Denise
bcipam2010-05-02 19:01:37 +0000 #4
I do log my spin class as mileage. I figure for a tough class with lots of speed work, equates to about 20 miles. Keep in mind there are no stop lights or signs or other road hazards so 20 miles is probably conservative. If there is lots of "hill climbing" then I lower the mileage to around 15 miles. In addition, if I continue to ride after class, which I often do, I lower the mileage 'cause I'm not working as hard. For 2 hours, I usually give myself 35 miles. I figure I can easily do 35 miles in two hours on the road when there are no lights or signs.
traveller_622010-05-02 19:11:57 +0000 #5
I think Veronica's idea for estimating miles for a spin class is sound. I record both hours and estimated distances for spin classes reckon that an hour in a fairly intense spin class for me is about 20-24 miles.
RoadRaven2010-05-02 20:29:47 +0000 #6
If you really wanted to calculate this, CindySue... you would also have to take into account the gearing you were in... plus cadence... I think it would become quite problematic.

It is probably best to record it as minutes/hours ridden at 'x' resistence...

Otherwise, if they don't have some kind of speedo on the bikes in your class, can you just take your speedo along and attach the magnet to your spin bike for the session?
cindysue2010-05-02 21:15:06 +0000 #7

Originally Posted by RoadRaven

can you just take your speedo along and attach the magnet to your spin bike for the session?[/COLOR]

guess I could, but it's not that big of a deal. My estimates are in line with the ones above, but I might just follow the lead of those who just log hours and not miles.....

it's raining today. I should be at the gym at least. Started cleaning out some old books and stuff for charity.....
Veronica2010-05-02 19:25:50 +0000 #8
We put a speed sensor on my rear wheel today. Forty-six minutes of The Uphill Grind Spinervals DVD and I went 11.5 miles, average of 15 MPH.

Don't forget to take into account all the rest intervals and warm up and cool down that are in a spin class. During the actual sets I was averaging 17 - 18 mph - with a high of 37.8!

We put the sensor on to get an idea of my power output. There's a chart on Kurt Kinetic site you can use to convert speed to watts. We wanted to check it in a controlled environment.

It's not a perfect match because there is more resistance when you're riding outside.




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