W/kg is going to be the only informative metric. For me, a 70% effort will generally average out around 2.4W/kg. Best recent effort for an hour, 3.2W/kg.




This is of course from a power meter, but Strava had gotten pretty darn close after logging 300+ rides pre-PM. Two to two and a half watts per kilogram is probably right in the middle of an endurance pace for many.