I have to force myself to eat at the checkpoints at night. I feel slightly nauseous while I'm eating, but within an hour of being back on the trail, I'm really glad I?ve done so, for my energy levels perk up. I skipped breakfast on the Northumberland 100, and it was a fatal mistake (one of many on that walk). What works for me is to try to eat a little at every checkpoint. Joint stiffening: I find I stiffen up when I stop at the checkpoints, but loosen up after five minutes of being back on the trail.
Recovery: I eat and drink a lot for two days, and have no energy. I also get cramp in my hands until I take some salt.
On the injury side, I developed metatarsalgia on the Boot (swelling of the second toe joint in the ball of the foot). I applied the RICE technique someone recommended in another posting - or at least the Ice part of it - and it worked astonishingly well. After six or seven hours of sitting with my foot on a bag of frozen peas, the swelling and tenderness had practically disappeared.
http://www.valleyhealth.com/Health_Library/Article.asp?content_id=1330&p=