high stress / high training load - what’s the power range to accumulate high stress training load ?
Answered in the other thread, but will share here as well 
In order for you to effectively put strain on your ‘High’ energy system, you would want to be riding at an effort somewhere between your ~90s power & ~6 min power, which is where your HIGH energy system contributes the most to your power output.
thanks, I couldn’t find it. so it’s quite high, for me it’s above 126% of FTP (from Xert)