VO2 Testing via metabolic cart; protocol on rowing erg?

[SelfWillRunRiot]

Hey there,

I'm currently researching VO2 Max testing protocols using a metabolic cart and have come across different means of increasing intensity throughout the test. The method I've come across deals with decreasing pace by 2 second intervals thougout the test every minute. Just wanted to inquire on here if anyone has used this method or uses another method using watts, etc.m

Thanks!