I was trying to check some data from a KOM I took where Strava and the Garmin Connect app were showing me 346W avg for exactly 7’. However Strava doesn’t show normalized power and neither does the Garmin Connect app for a selected part of the ride, so I tried to check on Intervals.icu.
However there it says I did 364W avg. with a NP of 352W, which seems odd given the duration of the interval and the fact that I had to stop pedalling a few times with turns and so on. I’ve seen it before on short sprints…
Link: Intervals.icu
Screenshot:
“For very short intervals, normalized power can be lower than average power. This is because that when calculating normalized power, each data point in the selected range is calculated using the entirety of the 30 seconds prior to itself, which is the basis of NP. … The same is true for a 30-second peak or a minute.”
Apparently it’s not good for intervals under 15-20 mins according the the second Forum posting, the rule being the higher number is the one to focus on.
I don’t know the truth in it all, but it’s interesting to see.
Thanks! Although I’m not at race weight at the moment, at 67-68kg I’m going alright
My 5’ PB last year was 365W for 5’ but on an incline so a bit easier to apply power, so I’m happy to get close to that for 7’ now on a flat lap with quite a few corners…
When the Garmin keeps showing numbers in the regio of 350-400W when you look down, it sure is good for the moral.
You can see why NP is lower if you turn on the 30s power trace. NP is based off a 30s moving average so low power before and after an interval will knock it down.
