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@skinny
@SEd.
If you're going to use a watt bike. Don't. Or if you must, is has to be the same one every time you test. AS the 'power' value between machine can be large.
If you do a 20min test, a large portion of that is going to be anaerobic. So either you need to do a 5min blow out first. Or not and be aware that the value you get is anerobically affected.
Youre % of 20min power will vary over time. But 95% is average. Use a lower % if you don't do the 5min blowout.