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Question for those with Stages power meter

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Question for those with Stages power meter

Old 07-02-15, 10:59 AM
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Question for those with Stages power meter

Are your power graphs pretty smooth? I'm trying to figure out if it's just me or Stages just doesn't update very quickly.

I consider myself to be a pretty smooth pedaler, but my graph from today (3x9min intervals) looks like this:

Speed, power, heart rate, cadence. Warmup/cooldown before/after. The 3 constant raised lines are the 3 intervals. Very smooth on everything but power. Obviously power is the hardest to maintain perfectly but this is still odd to me. The route I did today was pretty much perfectly flat, 50ft gained over 23 miles.

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Old 07-02-15, 11:10 AM
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Power is hugely variable, it jumps around like crazy. That's why I look at a moving average.
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Old 07-02-15, 12:08 PM
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I don't know what that range is, but it looks better than my graphs. To really get any insight into power, you need to have a program that can break down these crazy graphs into something more sensible, like what zone you are in for how long and during which segments/laps, etc. You aren't going to get much out of just looking at the graph, they will be too much all over the place.
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Old 07-02-15, 12:35 PM
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Originally Posted by Seattle Forrest View Post
Power is hugely variable, it jumps around like crazy. That's why I look at a moving average.
I was looking at a friend's graph (Powertap) and his were way smoother. He's a very skilled cat1 guy so I don't know if it's a difference in power meters or technique.
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Old 07-02-15, 12:38 PM
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Originally Posted by cthenn View Post
I don't know what that range is, but it looks better than my graphs. To really get any insight into power, you need to have a program that can break down these crazy graphs into something more sensible, like what zone you are in for how long and during which segments/laps, etc. You aren't going to get much out of just looking at the graph, they will be too much all over the place.
I cropped out the warmup/cooldown but here are all the "working" laps. 3 sets of 9 minute over/under intervals. 2 minutes @ ~300-310w immediately followed by 1 minute @ ~340-350w, repeat 3x, take a 5 minute break, repeat all of the above 3x. I felt fresh at the end so I did my last interval @ just under 390. Will have to go harder overall next time.


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Old 07-02-15, 12:40 PM
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Depending on if you have smoothing on or not, it can make the graph look more rough. Your cadence isn't particularly smooth either, but I don't know what the scale is.

After a second look, I believe your graph came from strava, my power line looks way smoother than that, cadence too, I'm using a powertap.
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Old 07-02-15, 12:42 PM
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Originally Posted by greenlight149 View Post
Depending on if you have smoothing on or not, it can make the graph look more rough. Your cadence isn't particularly smooth either, but I don't know what the scale is.
I'm not sure how to enable smoothing... I have my Garmin set to 1 second readings (instead of "smart" readings) and have it set to include zeros. I'm doing my best to maintain power so slight changes in wind/road grade change my cadence.
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Old 07-02-15, 12:42 PM
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Stages Power Meter In-Depth Review Update | DC Rainmaker

Here is a good article comparing stages with some other power meters.

Your power meter graph looks completely normal to me.
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Old 07-02-15, 12:44 PM
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Originally Posted by RJM View Post
Stages Power Meter In-Depth Review Update | DC Rainmaker

Here is a good article comparing stages with some other power meters.

Your power meter graph looks completely normal to me.
Here's one from a friend of mine, his intervals boxed in black, they look a lot smoother. Same length of ride/scale of graph.

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Old 07-02-15, 01:16 PM
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Totally depends of what you are doing too.

Here is data from a pair of time trial intervals on the trainer, power tracings are very smooth:





Here is data from an actual time trial on the road, I am trying to be smooth but I don't quite achieve that:






Here is data from a casual ride with a friend that has some climbing, power data is all over the place:





This is all normal. It's also normal for the power data to be more smooth during an interval, because it's a hard effort, often times you are at max effort and you can't really vary that much from your target (except by going too low on your power).

My tracings posted above are all from an SRM power meter. But I have two Stages power meters too and the power data looks the same.
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Old 07-02-15, 01:19 PM
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Originally Posted by Heathpack View Post
Totally depends of what you are doing too.

Here is data from a pair of time trial intervals on the trainer, power tracings are very smooth:





Here is data from an actual time trial on the road, I am trying to be smooth but I don't quite achieve that:






Here is data from a casual ride with a friend that has some climbing, power data is all over the place:





This is all normal. It's also normal for the power data to be more smooth during an interval, because it's a hard effort, often times you are at max effort and you can't really vary that much from your target (except by going too low on your power).

My tracings posted above are all from an SRM power meter. But I have two Stages power meters too and the power data looks the same.
Whoa, I didn't know you could record Strava on a trainer. I thought you had to be moving but it looks like yours is labeled by time. Do you just record like normal or what?
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Old 07-02-15, 01:20 PM
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Originally Posted by Alias530 View Post
Whoa, I didn't know you could record Strava on a trainer. I thought you had to be moving but it looks like yours is labeled by time. Do you just record like normal or what?
I upload it to Strava after the ride. This is what I do for all my rides, actually. I never use the app.
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Old 07-02-15, 01:23 PM
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Originally Posted by Heathpack View Post
I upload it to Strava after the ride. This is what I do for all my rides, actually. I never use the app.
So you just press the start button like you would if you were riding outside and upload after? I didn't know you could do that. Do you need a speed sensor on your rear wheel? I let the satellites determine my speed...
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Old 07-02-15, 01:26 PM
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Originally Posted by Alias530 View Post
So you just press the start button like you would if you were riding outside and upload after? I didn't know you could do that. Do you need a speed sensor on your rear wheel? I let the satellites determine my speed...
No I don't press the start button. I get back from a ride, connect my bike computer to my desktop computer, so to the Strava website and hit upload. That pulls the data from my bike computer onto the Strava website.

Yes, if you want speed readings on a trainer (which are not relevant), you need a speed sensor on your bike. Yes, I have a speed sensor on my rear wheel.
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Old 07-02-15, 01:29 PM
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Originally Posted by Alias530 View Post
So you just press the start button like you would if you were riding outside and upload after? I didn't know you could do that. Do you need a speed sensor on your rear wheel? I let the satellites determine my speed...
I turn my gps off on the garmin unit when doing trainer riding...but yes, it records the workout.
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Old 07-02-15, 01:29 PM
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Originally Posted by RJM View Post
Stages Power Meter In-Depth Review Update | DC Rainmaker

Here is a good article comparing stages with some other power meters.
That's an okay article but the original review was better.

Originally Posted by Alias530 View Post
Very smooth on everything but power. Obviously power is the hardest to maintain perfectly but this is still odd to me. The route I did today was pretty much perfectly flat, 50ft gained over 23 miles.
Power can be variable, but to know whether your specific power recordings were noisy or not requires more analysis than just looking at a few graphs. Basically, your power meter may be right, it may be wrong, but you're using the wrong tool to be able to tell.
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Old 07-02-15, 01:39 PM
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Originally Posted by Heathpack View Post
No I don't press the start button. I get back from a ride, connect my bike computer to my desktop computer, so to the Strava website and hit upload. That pulls the data from my bike computer onto the Strava website.

Yes, if you want speed readings on a trainer (which are not relevant), you need a speed sensor on your bike. Yes, I have a speed sensor on my rear wheel.
I mean do you press the start button on your Garmin at the beginning of the trainer session the same as you would before riding outside? Then upload like normal afterwards?
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Old 07-02-15, 01:41 PM
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Originally Posted by Alias530 View Post
I mean do you press the start button on your Garmin at the beginning of the trainer session the same as you would before riding outside? Then upload like normal afterwards?
Oh.

Yes, that is what I do. Start and stop the Garmin just like any other ride.
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Old 07-02-15, 02:30 PM
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Originally Posted by Heathpack View Post
No I don't press the start button. I get back from a ride, connect my bike computer to my desktop computer, so to the Strava website and hit upload. That pulls the data from my bike computer onto the Strava website.
FYI,

(1) If you plug your Edge into your desktop and have Garmin Express running in the background (or launch it), it'll upload all of your new rides to Garmin Connect automatically.

(2) There's a feature in Connect that will automatically export your activities to Strava as soon as you upload them.

You don't ever have to actually look at Garmin Connect, it's just an easier way to get your data to Strava. If you let Express start with your computer and run in the background, you basically just plug your Edge into your desktop, and the ride is on Strava.
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Old 07-02-15, 02:48 PM
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Originally Posted by Seattle Forrest View Post
FYI,

(1) If you plug your Edge into your desktop and have Garmin Express running in the background (or launch it), it'll upload all of your new rides to Garmin Connect automatically.

(2) There's a feature in Connect that will automatically export your activities to Strava as soon as you upload them.

You don't ever have to actually look at Garmin Connect, it's just an easier way to get your data to Strava. If you let Express start with your computer and run in the background, you basically just plug your Edge into your desktop, and the ride is on Strava.
Yes, I know. Sorry I thought the Strava upload process was off-topic. I was just trying to be succinct, to contrast what I do with running the app.

Lol, if we're willing to stray off topic, here's what I actually do.

1. On the Garmin, stop the ride, then save it, then get off the bike, then turn off the Garmin because my desktop won't recognize the presence of the Garmin if the unit it on.

2. On my desktop, open Garmin connect, open Strava. Meanwhile, my desktop has recognized the presence of my Garmin.

3. On desktop, use Device Agent to move data file from my Garmin to WKO. Annotate my ride in WKO, label my intervals, make training notes, change the ride title, save the file. Meanwhile, my data has been automatically uploaded to both Strava and Garmin Connect.

4. Copy the ride title from WKO, open my Strava file, hit edit and change the ride title. Save the changes.

5. Sit back and collect kudos all day.

If ya'll want the gory details.
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