By Scott Proscia
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May 31, 2021
Intro to Nutrition: Imagine if you were in a big city traveling with a large group of people. You got to the subway station and realized only a small amount of you would fit on the subway car. You are left with two options: wait for the next subway car and continue to move your group over a longer period of time or use the bus that runs at street level and move some of your group to your destination at the same time on the bus. Even though the bus takes longer the synergistic effect of being able to trickle some of your group members to your destination via two transport systems is most efficient. Race day nutrition functions in a similar manner. An average size male athlete has absorptions rates between 30-90grams/hr during exercise. The upper end of this scale 90g can only be achieved with utilizing multiple delivery methods our bodies can utilize. We transport glucose and fructose via different transport systems. Knowing what is in your nutritional product is key and what you tolerate well is vital to your performance. Triathlon Fueling Options There are many triathlon fuel options available and an entire industry devoted to it. Glucose, fructose and maltodextrin are the primary ingredients that contain the calories of these fuel sources. The delivery methods come in powders that are mixed into liquids solutions, gel packets, bars, chewy candies etc… The delivery method to use is very individual. As intensity increases blood is shunted from the core of the body and shifted out to the working skeletal muscles. This slows the digestion process down significantly and may wreak havoc on a normally iron stomached person. With under-fueling the dreaded “bonk” or “hitting the wall” technically called hypoglycemia may show up stopping an athlete in their tracks whereas on the polar opposite end of the spectrum over fueling in a short duration may lock up the stomach and shutdown all forward progress and leave you lying on the side of the course in the fetal position contemplating jumping in front of traffic to end the misery. As the distance of your triathlon increases nutrition inevitably becomes more and more important. As any motor vehicle is limited by it’s efficiency and size of it’s gas tank the human body functions in a similar manner. We can store around 1hr-1.5 hrs worth of calories on board in the form of glycogen which we store in our skeletal muscles and liver. Practicing Nutrition for Half-Ironman and Ironman Distance Events In half Ironman and Ironman distance events developing and practicing a nutritional strategy is vital and should be implemented in to the specificity of the workouts during the build- up. The old cliché “Nothing new on Race day” is very fitting in regards to nutritional strategies, therefore rehearsal and fine tuning is imperative. Individuals usually tolerate liquids fairly well. If you can find out what you’re “A” race will have available on course it is a good idea to start utilizing that on your longer workouts, or have a strategy and set up that allows you to carry all you will need on board your bike of a liquid of you’re choice. A host of bike hydration options are available, often a simple behind the seat and between the aerobars set up is a good safe option. Practice with that bottle location to assure you can that it can be safely and effectively reached during the ride. On the run there are options to carry your own liquids as well through the use of fuel belts. Maltodextrin products such as CarboPro are tasteless and easily dissolvable in most liquids. There are also flavored options available @ INFINIT Nutrition (IREPINFINIT for 10% off at check off) Practice adding these at different amounts to deliver more calories during exercise to replace the calories burned and increase performance. Triathlon Fueling Options Continued Gels would be our next easiest product to process during an event. Some gels are mixed with sources of fuel that come from fructose and glucose. Also pay attention to your electrolyte needs, a “salty” sweater may benefit from a gel that contains more sodium in hot/humid conditions. You may also get some benefit from gels that contain caffeine as it is a proven performance enhancer. As food sources start to get more solid the processing time increases as some more complex digestion is required. Some may choose to experiment with more semi solid/solid food sources. While some do very well with these types of fuel, be cognizant of how easily these are eaten at race pace. The unwrapping and chewing process can be more difficult than one may think and leave people unsteady on a bike or choking on the run. A quick and easy starting point is to assign 2 calories per hour per pound of lean body weight. Example: 200lb @ 20% Bodyfat 200lbs x .20 = 40 lbs of fat 200lbs – 40lbs = 160 lbs of lean body mass 160lbs x 2 cals per lb per hour = 320 calories/hour In summary, KISS (Keep, It, Simple, Stupid). The less moving parts the better and the simpler your nutrition strategy the more likely you are to execute it perfectly. Sometimes Less is More and Nothing New on Race Day!!