squeeze and grin.

(can we refer to this as #1 and #2?)

Seriously though, I've been through two 22 to 24 hour small cat sails, and numerous 12 to 14 hour legs and #2 has never been a consideration. A good constitution I suppose?...

After reading about Steve Fossett's single handed flight around the world, he did have a very specific diet to control this - it consisted mostly of protein shakes but I don't know the details.