Measuring power while running

[isazi]

@FunkyLarma I do not think Suunto uses GPS at all in running power estimation, in fact it works also indoor and with GPS disabled

[Egika]

@Danny-poleg said in Measuring power while running:

@herlas So just to understand - the algorithm that calculates the watts - power, in case I only use the watch, relies on - speed (with the help of GPS), step- cadence, ascent and descent on the track using a barometer & HR.
thank you

just guessing, but I highly doubt that HR is part of the formula, as it is how your body reacts to the power needed to keep you moving.
As @FunkyLarma states, power is force multiplied by velocity. For the force you need some good estimations, what to move against any friction, which is not trivial for running. But i guess there are lookup tables that correlate a certain running speed and body weight with the power.

What we know is, that Suunto has tuned the algorithms in a way that they match Stryd’s output very well.
Garmin produces different data.
This means running power data should only be compared between different runs done with the same device.

[herlas]

@isazi are you sure? At least in my limited number of treadmil workouts this hasn’t been the case.

Also tested some time back running through a tunnel and the power reading dropped to 0 as soon as GPS was lost as well.

• came across this one :

https://www.suunto.com/en-us/sports/News-Articles-container-page/run-with-power/

… Suunto 9 Peak Pro measures running power from the wrist combining GPS and barometric data.

[isazi]

@herlas strange, I can record power even walking indoor (but have not tested the S9PP)

[Łukasz Szmigiel]

@isazi isn’t it just calibrated outdoors?

[VoiGAS]

@Łukasz-Szmigiel Sorry for wakening this old thread, but maybe it is helpful:
Tried it today wirh the Race S, measuring Power also works indoor - at the end of an outdoor run. I was climbing the stairs to my flat in the 5th floor and it showed plausible values

Would be great to have a real indoor sports mode with power, like treadmill

[VoiGAS]

Update: Tried to trick the watch today on the treadmill, just used the running mode without gps.
Power is shown, but it was about 50% to high, same with the distance. The running mode doesn’t seem to use the correction factor like the treadmill mode - thats strange. Else it would work…

[zadow]

GPS is essential for calculating Running Power.
It is stated in the watch manual as well:

Suunto 9 Peak Pro measures running power from the wrist combining GPS and barometric data. Ensure your weight is correct in the watch settings for the algorithm to work properly. Your weight is set at Settings > General > Personal > Weight.

[docsport77]

@isazi Hi, came across this old one as I would love to get back from Garmin to Suunto but when the Suunto service wrote me that running power is only working outside 🥺
From what I understand your get similar power numbers for the same place whether your age running outside or indoors - is that correct?

Thank you

[VoiGAS]

@docsport77 Power doesn’t work if you choose the treadmill activity, but you can use a Running activity and deactivate GPS. Not very accurate I think, but it works