Knowledge Base/Documentation/TrainerRoad Player

Interval summaries explained

Reid Weber
posted this on December 17, 2012 02:54 PM

In this post: You will learn about the interval summaries that display after you complete an interval.

In version 1.3.5 we added a prompt that displays in the upper right-hand corner of the workout screen that gives you information about the interval you just completed (screenshot below).


What does each line of display mean?

Interval Time: The top line indicates how long the interval you just finished was. Depending on the workout, this can be a nice reminder of just how painful even short periods of time can be ;)

Average Power: The second line displays your average power for the interval. Nothing too complicated here.

Distance from target power: The third line indicates how close you came to your target power. So, the screenshot below indicates that the rider was two watts below their target power of 403 watts.

Precision: The fourth line (related to distance from target power) displays how accurate your power was throughout the interval. Precision is defined as the percent of time that power was +/- 10 watts from the target. 

The idea is to promote staying close to a target during the entire interval. 

I used this on Beacon yesterday. I think the precision of the intervals were 50%, 55%, 57%, 65%, 55%, 40%. So even though I was always pretty close to the target with average power, how smoothly I delivered the power changed quite a bit from one interval to the next.

You can see that concentrating on it produced a much smoother graph than a few weeks before when I did Carson.

I hope this will be useful data to look at during a ride. We'll eventually add it to the ride summary as well. 

+/- 10 watts is just a starting place. With my power tap, I would have liked +/-15W better but I think for virtual power and Computrainer. +/- 10W might be to big of a range. Let me know what you think after you try it.

Cadence: The fifth line will display your average cadence for the interval.


Note that if you have a heart rate monitor paired, this will also be displayed in the summary.



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Peter Linnard

I like the idea enhancements. I'll let you know what I think after giving a good test this week.

On a personal note, I am concerned that you are working too much ...  Your FTP has dropped 10 watts over the course of the last month!

December 17, 2012 03:06 PM
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Reid Weber
Trainer Road

Lol! That could be true. My FTP has hopefully gone up. I'm getting ready to do another test right now. Having more power meters isn't necessarily a good thing. The SRM seems to be reading about 30W high and that's what I used when I did Carson. The last few rides have been on my TT bike with a powertap.  I'll probably have to check the calibration of the SRM here pretty soon.

December 17, 2012 03:54 PM
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Peter Linnard

The good news for you is the crank meter is more accurate than the hub based meter -- not because of the technology, but the closer you get to your body, the lower the loss of power through the mechanical system (through noise, heat, inefficient movements etc.) So I think you should go with the higher SRM number. 


PS - I just made all that crap up, but It makes me feel better about my sad power numbers!!

PPS - We're all very happy that you DO work too much.  Keep the enhancements coming!

December 17, 2012 04:32 PM
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Nice.  I think it is a simple, useful enhancement!

December 18, 2012 06:46 AM
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I like it... that's the point isn't it - try to stay close to the target, that's why it's called a target.  It's nice to have that feedback.

December 18, 2012 06:00 PM
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jean-robert strele

Nice work. I hadn't realized that this was available for so long. I usually train with the horizontal window, while watching the News.  

May 13, 2013 05:15 PM