Why do you roadies even care about 5 sec power? Seriously, it has such LITTLE to do with road racing performance.
If you have trouble producing 800watts for 5 sec, and you aren't an 80lb 12 yr old girl, then you sure must have trouble climbing a flight of stairs briskly.
I'm talking like this because I believe all of you have the potential to vastly improve your neuromuscular power. Since you are endurance athletes to begin with, your neuromuscular power is going to be garbage. You have SOO much room for improvement.
Get out there, and hit the f'n pedals hard like you have never done before. No, don't just push it, I mean tear the f'n bike apart. I don't care if you have 10in arms and 18in thighs, doesn't matter. Sprinting is so mental, there is such a wide range of performance for what I can do, depending on how I feel and a lot of other factors. But if you don't give it 110% and go apesheet on the bike, of course your 5 sec will suck.
I see a lot of 'older' guys out there, and just by obversing them on the bike it's no wonder many of you have trouble with sprinting. Endurance cycling teaches you to be SLOW, not eXplosive.
Oh yeah, I forgot. Why do we even care about 5 sec power?
BTW, I bet Boardman could of gone over 1000w if he had the slightest interest in it, which he didn't. Why would he?