Originally Posted by
livedarklions
Again that's a neat trick on a short steeply u shaped course as getting to vo2max on the downhill 50% is likely impossible for you or most of us mere mortals. How are you measuring your vo2max btw?
Let's not forget that he's already declared that it's impossible to work as hard on flat ground as you can going uphill, so he obviously can't do HIIT there, either. "Simple," was how he described the logic, IIRC. Anyway, he's quickly running out of room to workout on his circuit.