28m is ok then but you will be able to bring that down a fair bit with ‘technique’.
Incidentally this is another benefit to a power meter – it’s best to be at constant power all the time, but in the first few minutes your target power will seem really easy and in the last 10 it will seem murder. You WILL be going off too hard if you’re not using one (or have never used one).
*wonders if power station and cough are related*
I get a raw trachea from a really hard workout, which makes me cough in a feeble pathetic manner thus adding to my general pained martyr to the sport demeanour that I cultivate. Worse in cold weather though.