Friday, September 23, 2016

Nutrient Timing (Part 1)



              
            Of all the topics within sports nutrition, one topic seems to be far more popular than the rest. That is the topic of nutrient timing. Every athlete wants to know exactly how much to eat and exactly when to eat it. While, in my opinion, using the training plates presented in my previous article are the easiest and possibly best way for most athletes to determine their meals for the day, there is some more fine tuning that can be done if you’re ready to do a little math. So get your calculators out and let’s get going.

            With this article we are going to focus on estimating your overall daily needs of protein and carbohydrate. We will focus on these two because carbohydrates are our fuel source while protein is what repairs and builds our muscles. Our next article will focus on using your recovery window as the guiding principle to determine what times during your day you should be getting these nutrients.

            First, let’s talk about how many grams of carbohydrate and protein a typical high level athlete may need each day during training season. What is recommended by the Academy of Nutrition and Dietetics, Dietitians of Canada, and the American College of Sports Medicine is that an athlete consume 6-10 g/kg/day of carbohydrates and 1.2-1.7 g/kg/day of protein. Don’t let the numbers and metric units scare you off!!! Look below for a walk through of the calculations for a 175 lb athlete.

1.       175 lbs / 2.2 kg/lb = 79.5 kg
2.       79.5 kg x 6 g/kg/day of carbohydrate = 477 g of carbohydrates
3.       79.5 kg x 10 g/kg/day of carbohydrate = 795 g of carbohydrates
4.       79.5 kg x 1.2 g/day of protein = 95.4 g of protein
5.       79.5 kg x 1.7 g/day of protein = 135.15 g of protein

There you are! 5 simple calculations and you have your numbers! For our theoretical 175 lb athlete we got a carbohydrate range of 477-795 grams of carbohydrate per day and a protein range of 95-135 grams of protein per day. One more series of calculations!

1.       477 g of carbohydrate x 4 calories/g = 1908 calories
2.       795 g of carbohydrate x 4 calories/g = 3180 calories
3.       95 g of protein x 4 calories/g = 380 calories
4.       135 g of protein x 4 calories/g = 540 calories

So, our final count is 1908-3180 calories from carbohydrates and 380-540 calories from protein each day. What a range! How in the world do you know how much is right for you? The answer comes down to what level of training you are currently in. Let’s take our hypothetical athlete and say he is a swimmer doing 2-a-day practices with a weight lifting session in addition. They would be at the high end of our range. Now, let’s say our athlete is a distance runner having a normal practice during his season. He would be on the low end of this range.


Using these numbers as guides for planning your meals can help ensure that you as an athlete are properly refueling your body with important building blocks for energy replenishment, muscle repair, and muscle growth. Be warned however, if you cannot be honest with yourself about your level of training than you may end up eat way to much or too little food. Also, check out the reference table below for some pre-complete calculations!

Weight
Weight in kg
Carbohydrate Range in grams
Protein range in grams
160 lbs
72.7 kg
436-727 g
87-124 g
170 lbs
77.3 kg
464-772 g
93-131 g
180 lbs
81.8 kg
491-818 g
98-139 g
190 lbs
86.4 kg
518-864 g
104-147 g
200 lbs
90.9 kg
545-909 g
109-154 g


Michael Coseo MS, RD, LD

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