I’m studying my Strava records of ascents up the Zwift Insider verified Alpe du Zwift segment. My times range between 1:29:54 and 1:07:54. My average power ranges between 177 and 227 Watts. My VAM ranges between 691.3 and 915.3 meters/hour. My rider height and weight are constant across all ascents, only the bike frame and wheel set changed from time to time.

What’s interesting is that my VAM/Average Power holds fairly steady at about 4 meters/hour/Watt. Knowing that the Zwift Insider verified Alpe segment has an elevation difference of 3398 ft (1035.71 meters), can I use VAM/Average Power to calculate the average power I would need to produce to climb the Alpe?

I would need a VAM of 1035.71 m/hr to climb 1035.71 meters in 1 hour. So I would need to produce (1035.71 m/hr) / (4 m/hr/W) = 259 Watts to climb the Alpe in an hour. That seems reasonable to me.

Is this a legitimate calculation to make?