aerobic decoupling

[Brad_Olwin]

@wakarimasen If I am maintaining aerobic metabolism below my aerobic threshold the S+ app will show good or a green number. If I an going too hard it will show red in real time.

[wakarimasen]

Thanks @Brad_Olwin - that’s clear. Does this depend on the heart rate established during the reference period? I tried this app during a walk earlier in the week and saw negative and positive percentage values following the baseline being established.

[lexterm77]

@Brad_Olwin said in aerobic decoupling:

@wakarimasen If I am maintaining aerobic metabolism below my aerobic threshold the S+ app will show good or a green number. If I an going too hard it will show red in real time.

Assuming that entire run (including base evaluation time) has a constant grade. Else, not really because math and stuff.

[halajos]

I can’t get this S+ app to work properly on my S9B. I tried it when it was first introduced and then didn’t use it for long. Now I’m experiencing all kinds of issues with it. First I wasn’t able to activate it on the watch (when I tried to select it, the selection reverted to ‘none’). Then after a soft reset I could activate it, but had a crash during the run. Tried to reinstall the S+ app, then also the suunto app on my phone, but still have issues. Now I can select it, but the S+ screen is blank (while other S+ apps’ screen isn’t). Anyone else having issues?

[A Former User]

I recently ran into this problem. Sometimes the GPS behaves strangely for known or unknown reasons (probably because I was under a 380kV power line…), and as shown in the image, where the speed suddenly went from ~7 to ~23 km/h (and then later from 7 to 14km/h) for several seconds, the decoupling recording was compromised. Can anything be done to filter out these spikes in the S+ app?

[JVallS]

Using a S9B I cannot get S+ AD app to work for Treadmill activities. It works well for Run activities though: live Good/High green/red labels and % change on the watch after warm-up and baseline evaluation, and reasonable max/final 5-min rolling avg values and charts in SA.

For Treadmill activities I can select the AD app and start recording, warm-up and baseline show the countdown in the dedicated screen on the watch as usual, but from 20’ on I get a fixed screen with the High red label and dashes for % change. SA gets the laps (10’, 10’, and the rest), but there’s no record of decoupling at all. @Raimo-Järvi, could you report or look into this?

It’d be great–for the incline/speed (constant external) established during warm-up and settled as baseline for the activity–to see whether or not and when my HR (internal) decouples. Despite pace being off-the-mark on a treadmill, especially at an incline, the internal to constant external ratio can be a great indicator, and a treadmill provides repeatability for progress assessment.

I’d appreciate your comments, @Brad_Olwin.

[Raimo Järvi]

@JVallS Unfortunately I don’t work for Suunto any more, so I can’t do anything to fix this. I guess Aerobic decoupling app requires a power sensor for Treadmill activities, were you using one?

[JVallS]

@Raimo-Järvi Thanks for writing back.
Not using a Power meter at all and S+ AD never prompted me for one. Using a decent OHR armband (Scosche Rhythm+2.0) though. A chest strap is too much of a bother.

I understood that aerobic decoupling works on Pace (and HR) ratios in running sports and Power (and HR) in cycling. The issue was addressed above (Q 29 Jan 2024: https://forum.suunto.com/post/137994; your response 30 Jan 2024: https://forum.suunto.com/post/138079).

Again, thanks for writing back.

[Raimo Järvi]

@JVallS I’m sorry, I should have read my own responses I think Aerobic decoupling app was fixed for nordic walking so that it uses pace. But treadmill still uses power: if I activate it in Suunto Vertical for a treadmill activity, it says “Power not available…”.

I’m not sure why treadmill wasn’t changed like nordic walking, or if it was intentional. Since I didn’t reply anything about treadmill, maybe I just missed it and it was accidentally left to use power

[JVallS]

@Raimo-Järvi Who do you think I should reach out to about this then? It’d be great to have it sorted out!