Originally Posted by
ancker
Sufferscore is almost always way off (compared to TSS or CA's "Load"). Average/Normalized power is different (not necessarily wrong, but different than Garmin and Cycling Analytics.) Basically, I had premium for a while and tried to compare the numbers with some relation to Garmin/CA and Strava was sometimes higher, sometimes lower, so I gave up. I still use strava, just not premium and only upload outdoor rides.
Strava's sufferscore has nothing to do with power or training load. Strava's equivalent of TSS is called training load. Suffer score is based solely on time spent in the various HR zones.