Protein & Fat on the Run…
April 6th, 2009 by ScottSince racing season is in full swing, I thought I’d share my latest recipe for condensed liquid calories and protein. There’s been a lot of debate on the benefits of protein during endurance events. While many products extol the virtues, most research has not found a
direct link between protein and enhanced performance. One may think the calories from the fat and protein eaten while running provides energy, but that’s not the case. Our bodies have enough stored fat to provide energy at low to moderate intensities, and ideally we should not be burning protein for fuel. For higher intensities, carbohydrate is the fuel of choice. We usually have only 60-90 minutes of stored carbohydrate in the muscles (i.e. glycogen) at our disposal. Any additional carbohydrate needs to come from food we ingest. So, from a scientific view we really only need to eat or drink carbohydrate for optimal energy levels.
So why might we want to eat protein and fat while exercising? Why do we crave the fat and protein on long runs? Although the jury is still out, I have found protein and fat to be beneficial during ultra endurance events (i.e. those lasting 3+ hours) for the following reasons:
1. Fat and protein give a feeling of satiety.
2. The presence of protein and fat lower the glycemic index (sugar spike effect) of carbohydrates.
3. They break up the carbohydrate taste bud monotony. We all know that eating carbs in the form of gels and drinks can get old, so the protein and fat can refresh the palette.
During racing and training, I always make sure I consume enough carbohydrates every 20-30 minutes and I have found it helpful to incorporate protein and fat. I prefer to get those from whole foods such as bean & rice burritos, energy bars, and liquids (i.e. shake or smoothie) regularly throughout a race. Over the years, I’ve used a drink called “Balanced” that no longer was available due to the company reformulating the product. I was forced to find an alternative protein “meal in a can” drink. A number of people use “meal in a can” drinks like Boost and Ensure that contain dairy and lesser quality ingredients. So I went to the labratory (aka my kitchen) to create my own vegan concoction.
There are many protein powders on the market, but I use Jarrow Soy Essence because it is less processed, non GMO, and fermented for better digestibility. And it tastes good and easily dissolves into most liquids!

Protein On the Run
2 tablespoons Jarrow Soy Essence Protein Powder
8 oz rice milk*
Combine ingredients and shake, blend or whisk until smooth.
If you want to add more carbohydrate calories, add 1 tablespoon of agave nectar, brown rice syrup, or other sweetener. Other options include ½ banana or 1-2 dates. For more sodium, add ¼ sea salt.
* making your own rice milk is easy and reduces the waste produced from containers.
1 cup of cooked white or brown rice
3 cups water
1 teaspoon sea salt
1 tablespoon agave nectar, brown rice syrup or other sweetener
Combine ingredients in blender and blend for 2 minutes until smooth. If the texture is grainy, strain through cheesecloth or fine strainer.
April 7th, 2009 at 9:43 am
Wow, I’m going to have to give that a try and see how my stomach likes it. Thanks for sharing, Scott. Good luck with your race season!
April 9th, 2009 at 7:50 am
[...] 9 04 2009 A helpful post from ultrarunning star Scott Jurek on nutritional intake during ultras (and bonus: a [...]
April 10th, 2009 at 6:41 am
Scott – are you a fan of Wild Fermentation? He has a similar recipe for making pepita seed milk.
July 7th, 2009 at 6:48 am
[...] Scott Jurek’s blog [...]
August 23rd, 2009 at 9:21 am
carbohydrate…
Your topic Acai berry products and Acai berry weight loss ” Blog Archive ” The … was interesting when I found it on Sunday searching for carbohydrate…
September 18th, 2009 at 4:51 am
[...] Fuel mix (Inspired by Scott Jurek’s drink mix) 16 oz. Rice Milk (I like enriched Vanilla Rice Dream) 3 tbsp Soy Protein (I like Yammer Soy [...]
October 25th, 2009 at 4:44 pm
Thanks for the info, Scott. I recently gave up on Soy milk due to the massive amount of packaging (due to my drinking massive amounts). Definitely going to try out your Rice milk recipe. As a vegan ultrarunner, I am always interested in hearing what works. Keep us posted!
~stubert.
http://runsturun.blogspot.com
June 5th, 2010 at 12:22 am
How is this drink used since it’s only 8oz and on the Jarrow package it warns about using more than two servings daily?
June 16th, 2010 at 8:11 pm
[...] while protein does not matter before or during a run, it can make you feel more full. (see this post on scott-jurek-happy-sigh’s [...]
July 4th, 2010 at 9:07 am
[...] eating and never get enough. I made a drink that I read about on Scott Jurek’s blog about protein. I substituted a German brand of soy product, but it was surprisingly good and I drank it easily. [...]