If you have a reasonable position on the bike AND you're not inhibited by carb depletion or injury and your legs don't hurt then you're just not pressing hard enough on the pedals. End of story.
Especially in a race, you can ride yourself into the ground and be deep in the hurt locker for a good couple of hours where the legs just scream "f**k no" and it's just a case of mental fortitude.
If you find it hard to push yourself to the point of physical discomfort then you should train on short hills at high power or take up the kilometer time trial or pursuit on the track. I did the kilo once... Once is enough.
Especially in a race, you can ride yourself into the ground and be deep in the hurt locker for a good couple of hours where the legs just scream "f**k no" and it's just a case of mental fortitude.
If you find it hard to push yourself to the point of physical discomfort then you should train on short hills at high power or take up the kilometer time trial or pursuit on the track. I did the kilo once... Once is enough.