heightened hunger after swimming

Happens everytime I swim. Everytime I get out of the water after an hour or more and I feel like I haven't eaten in a week, even if I ate just prior to getting into the pool.

My solution: Power or cliff bar in my swim bag, eat it in the car first thing - by the time I get home I'm not so ravenous...  

Found this in an article on another site:

"Researchers don't know exactly why this occurs, but they suspect that it's because the cooler temperature of the water causes your body to lose heat and the blood vessels in your skin to constrict. This prevents the release of certain hormones that suppress appetite during and soon after exercise, says Rudy Dressendorfer, PhD, an adjunct professor at the University of Alberta's Human Performance Laboratory in Edmonton.

One study conducted by Dressendorfer and his colleagues found that people who exercised in colder water consumed 44 percent more calories following their workout than those who expended the same amount of energy in warmer water. But you don't have to fall prey to after-swim hunger. Dressendorfer says that you can reduce it somewhat by taking a brisk 15-minute walk to warm up your body immediately after you get out of the pool."

 I have found a soak in the hot tub or a few minutes in the sauna works too.   I don't really buy the theory about how it is a whole body workout so you burn more carbs.   I don't go nuts after a 90 minute hard bike ride, but a 30 minute swim will get my appetite going.  90 minutes on the bike burns at least 3 times the calories than the short swim.  Also your leg muscle are larger and require more energy to move, unlike your arms and shoulders.