How do you eat enough calories in an aerobathon?

I would think you would want to fuel like a marathoner. Say your aerobathon is on Saturday - eat carbs Wed and Thur. Build up your glycogen stores. Friday should be healthy, but not too heavy (pasta dinners the night before do almost nothing for you). Saturday, get some light carbs in the morning - maybe a bagel and some yogurt. Then during, make sure you're hydrated and maybe use some GU or Hammer gels or protein bars to keep your energy levels up.

Yes, you will need to eat like an endurance athlete as Eagles fans suggests. During the event you might think about following the advice in item 3 on this web page:

http://www.hammernutrition.com/knowledge/the-top-10-the-biggest-mistakes-endurance-athletes-make.1273.html?sect=essential-knowledge-section

You can only absorb so many calories, and it's not usually as much as you are burning. So your diet in the weeks and days leading up to the event is also important. Make sure your glycogen stores are full!

Reporting back after my "thon" this morning.

I ate normally the last couple of days, had breakfast for dinner last night so carbs and protein. Ate my normal pre-workout breakfast this morning with two glasses of water instead of one and only 1 cup of coffee and off I went.

the way our thing was set up was they were doing back-to-back-to-back group fitness classes in one place and at the same time they were doing a spin-a-thon and you could go from class to class. So what I did was zumba for 75 minutes first thing, headed to the spin room and ate a Clif mojo bar before the first spin ride. I finished one bottle of water in zumba and refilled before the first spin class. I did 70 minutes of spin then had a banana and I refilled my water bottle twice. Did another 40 minutes of spin and had some cookies (options were limited at this point!).

I did close to four hours of fairly constant aerobic activity with short breaks to re-fill my water bottle. I felt fine. I was certainly DONE by the end and tried to do the final spin class but my legs had nothing left in them for the "metal mountain" (I also didn't pace myself like I should have-problem I have when I hear a great song I go hard!).

Hope this helps. I wish I'd had another banana instead of the cookies but those got inhaled pretty quickly!

No I don't think it was food fuel-I think it was just tired muscles and not pacing myself properly. I've done double spins before but not triple spins on top of zumba! I ate back some of the calories-indulged with Mexican but I still had quite a large deficit at the end of the day. I'll eat pretty healthy today and am taking my normal rest day but for some garage cleaning.