The recent thread about the last 1 minute of the ramp test (Fun with TR training analytics...what's this number for all forum members?) and how long you can hold it got me thinking. One goal going into this winter block is not only to raise my FTP, but extend the time I can hold FTP efforts in an attempt to get close to holding it for an hour or at least increase my 1-hour power. So I thought of two metrics using your power duration curve: longest time at current FTP, and 1-hour power as a % of current FTP.
Power duration for 301W: 24:20
1-hour power/FTP: 271/301 = 90%
Which makes me realize I need to get better at holding FTP efforts. Interested to hear other people’s numbers.