Endurance won't be any different with power augments, since they are +12 no matter strength or power augments.
But back to the fact that endurance is so high. I would look at your gear mods and make sure you are running the correct ones. You do not want to use the lettered mods. If you are unsure what I mean, here is an example.
Deft Mod 26 - 53 strength, 41 power and 32 endurance
Deft Mod 26A- 68 strength, 12 power and 41 endurance (strength heavy but power light)
Deft Mod 26B- 41 strength, 32 power and 53 endurance (endurance heavy)
The combined benefits from 53 strength and 41 power make the 26 mod the best of the 3. I'm guessing you might have some enhancements that might be endurance heavy as well. One thing you can do to help us help you better, is to go on to askmrrobot.com and create your toon there, and then come back here and post the link for us to evaluate your gear,