25 mile TT advice

Hi all hoping for some race advice (didn't know if this should go in the race results thread).
The local bike club has a Time Trial training series that I've signed up for. So far, done a couple of 5 mi TTs and a 10 mi TT. The next is 40 km!
As I understand it, the strategy is to go all out - max that HR and cadence and go for it - that's what I've been doing and it's worked out OK.
But, for 25 miles:eek: no way can I keep that up. So, what's the strategy - get in good enough shape and max everything out next year? Or, is there more of a pacing strategy for the "longer" TTs?
BTW - these aren't flat, I had erroneously thought TTs were flat and was amazed by the elevation (2-4% on the way out, and -2-4% on the way back - not much, but not flat)
thanks,
Sue

- I've been lurking for awhile, this is a great group of ladies!

TT...

Quite a specific form of racing as you will know.

Basically you should know what your heart rate maxes out at... mine is about 169/170bpm... then work out where your lactate threshold is... mine has been measured at 152bpm

So my goal in a TT is to sit just under my LT (about 150bpm) for the almost entire TT - the last kilometre you can push harder if you can, because the rise in lactate won't effect you til you are past the finish line.

If you have already been doing TTs at the shorter distances, then the only thing you need to do is train over 40km for the 40km TT.

Some people find that a HR monitor is good during a TT, because it tells you exactly how hard you are pushing your body and you know you are doing the best you can despite road surface or wind or other conditions.

Good luck and I look forward to hearing about how it goes. I am only training for 20km TTs at the moment. A 40km TT seems way out of my reach!