Nutrition Testing

I started doing some testing with maltodextrin this weekend at the suggestion of fellow blogger Mike. Maltodextrin is a common food additive containing easily digestible carbohydrates, yet is cheaper than sports powders. It can be purchased online or at your local brewing supply store, since it is a common ingredient used to brew beer. My local brewing supply store is 40 minutes away, so I ordered a pound online so I could experiment. There was no calorie label on the package but doing a little googling, it looks like a cup contains about 360 calories.

I had a long brick work out scheduled for Saturday for which I planned on mixing a one hour bottle and a long ride Sunday for which I planned mixing a four hour bottle. My first attempt was one cup of maltodextrin, one scoop of Gatorade powder and one tablespoon of salt. I mixed that up, took a sip and promptly poured it out :-). The Gatorade flavor was way too strong as was the salt taste. My second attempt was one cup of maltodextrin, one Succeed S!CAP for electrolytes and a little lemonade flavored Crystal Light for flavoring. The taste was pretty good so I went with it for my first test.

On the plan for Saturday was a brick workout consisting of an hour swim, an hour ride, and an hour run. Unfortunately, lap swim didn't start until noon and the temperature was forecast to be in the mid 90's with the heat index being over 100. If nothing else, it would be a good nutrition test. If you can take in calories in the heat and keep it down, it should work in just about all conditions, right? The workout went fine, nutrition seemed to taste good and sit well but I did cut the run short due to the heat (5k instead of a 10k). Cutting it short had nothing to do with nutrition. I didn't want to hurt myself and risk missing the long ride Sunday.

With that success, I decided to make a four hour bottle for Sunday. I mixed three cups of maltodextrin, three S!CAPS, and lemonade flavored Crystal Light again. Maltodextrin is easier to mix hot, so i mixed the bottle Saturday night and put it in the fridge. Sunday was a little cooler than Saturday, but not much. I set off on a four and a half hour ride with ~1100 calories in one bottle and a second bottle of water only. My plan was to take a sip of calories every 15 minutes and drink water to thirst. This plan seemed to work ok. A couple times I skipped a calorie drink because I was feeling a little bloated. This worked out so I finished the bottle four hours in. I think finishing it in three hours would have been a little soon. I did notice a slight after taste a few times, but nothing stomach turning.

The last half hour of the ride wasn't pretty. I was exhausted and over heated and stopped at every water fountain to pour water over my head. Afterward I think I hopped in the shower too quick because when I got out, I started sweating, got the cold shakes, nausea, and really light headed. Let me tell you, its tough to shave when you are about to pass out (and probably not a good idea). I laid down for a while and felt better. I guess I shouldn't be surprised since I weighed seven pounds less than when I started. I don't think it had anything to do with nutrition, I think it had to do with heat exhaustion. I guess when I do a full IM, I need to find a cool one.

With four and a half weeks until my 70.3, I'm running out of time to experiment. I did run to my local brewing supply store and buy some more maltodextrin and plan to try mixing some powdered Gatorade instead of Crystal Light for my next long session. Speaking of which, my next long ride is scheduled for Sunday, but I'll be in Cohasset, MA for a family visit and a little racing. The race should be challenging as it will be a cold ocean swim and ill be riding a borrowed bike. I'll try to fit in a long run while I'm there and a long ride when I return.

The goods :-)