Originally Posted by
hubcyclist
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But as far as research to prove either point, I don't think there's going to be anything compelling in either camp, you just have to find the right balance and consistency for you that results in growth
That's what I'm trying to determine, whether there's any compelling evidence either way. BTW, regarding the "hard" effort in PT, I did find one source that stated that the most effective hard efforts were at 90% of VO2 max power, specifically, a 4x8 minute workout at 90% of VO2max. That's a helluva of workout. And a couple of sources said we're talking 90-10 or 80-20 in terms of workouts for PT, not time spent in zone.