edit: seems that you should maybe do the 20s at 95-100% of FTP
Yes that's more how Coggan's guidance reads. I think that if you do them a bit too easy you get most of the benefit. A bit too hard and it's a different type of session and you get very little of the intended benefit (also too hard tends to put me in a hole for a while).
For me, if finishing both twenties is in any doubt then I'm doing the session too hard. If I have got it right then during the first twenty I am impatient and half-wheeling the PM. The second twenty then needs a fair bit of focus.
I think it's in the nature of this type of training that two or three watts too many can make a huge difference to RPE / ability to complete the session without a lot more whimpering than is optimal.
I am (tediously) evangelical about Coggan's threshold training. It made a big difference to my racing. Since I am always banging on about it but nobody ever listens / copies I assume the sessions do not suit most people.
Yes that's more how Coggan's guidance reads. I think that if you do them a bit too easy you get most of the benefit. A bit too hard and it's a different type of session and you get very little of the intended benefit (also too hard tends to put me in a hole for a while).
For me, if finishing both twenties is in any doubt then I'm doing the session too hard. If I have got it right then during the first twenty I am impatient and half-wheeling the PM. The second twenty then needs a fair bit of focus.
I think it's in the nature of this type of training that two or three watts too many can make a huge difference to RPE / ability to complete the session without a lot more whimpering than is optimal.
I am (tediously) evangelical about Coggan's threshold training. It made a big difference to my racing. Since I am always banging on about it but nobody ever listens / copies I assume the sessions do not suit most people.