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Showing posts with label glycemic index. Show all posts
Showing posts with label glycemic index. Show all posts
Monday, August 17, 2015
Potatoes: A Great Food for Runners!

Tuesday, July 27, 2010
Here's the Story...of a Lovely Potato...

This step-child of the veggie world often gets a bad rap. Many people seem to have the misunderstanding that potatoes aren't nutritious. I guess it's because they're not leafy or dark green, but actually potatoes are loaded with vitamins and minerals. Did you know that a regular baking potato contains 64% of your daily value of vitamin C and 53% of your daily value of vitamin B6, and a sweet potato has 700% of your daily value of vitamin A? Being prone to calf cramps, the thing I like most about potatoes is that they contain over 1,500mg of potassium. That's three times more than a banana! It's a bit of a myth that you have to eat the skin to get all the vitamins. The skin accounts for about 50% of the potato's fiber, but actually most of the nutrients are inside the spud.
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Potatoes are also a great source of complex carbohydrates. Pasta doesn't even have as much! No, they're not as romantic as pasta. And you don't normally have them by candlelight. And Lady and Tramp would have looked kind of funny sucking on opposite ends of a potato, but the fact is, potatoes make a great food for runners.
Now, I know what you're thinking, "Hey but aren't potatoes high on the Glycemic Index?" Yep, they do have a high GI, but for runners that's a good thing. It means they're easily and quickly digested and get into your system to be used as energy quickly. If you have trouble with potatoes spiking your blood sugar too quickly, you can remedy this by eating a little fat or protein along with your potato. Greek yogurt is high in protein and is very similar in consistency to sour cream. Adding a dollop to your spud will help prevent that spike and slow down the digestion helping to provide a steadier stream of energy. You'll get the same result if you add a little Smart Balance margarine which will provide some fat(the good kind--polyunsaturated and monounsaturated). Or try eating a potato with a little chicken or turkey.
After a run, you need to replenish your spent carbs really quickly and that's the perfect time to ingest fast-acting carbs. Potatoes are perfect for this. Add a little protein and you have the perfect post-run recovery snack.
Now beware. Your sedentary friends will be quick to tell you (as they munch on their Mickey D's fries) that potatoes are bad, that they spike your blood sugar, and will turn to fat on you quickly. The sad thing, is that for them, that thinking is exactly right. If you're not active and you're not using those carbs as pre-run fueling or post-run re-fueling, it may very will have all of those negative effects. But I for one am elated, that I can mix-up a little homemade potato salad (using lowfat mayo) and wolf-it down after a run.
So Marsha...I mean Pasta, move aside! Potato Jan is moving into her own!
Thursday, August 20, 2009
Why Are Carbs So Good?
One big reason carbs are so good is that it's the only fuel that the brain can use. That's actually one of the reasons why you hit the wall around mile 20 in a marathon. When your brain realizes that you're just about about out of glycogen (the form in which carbs are stored in the body for fuel) the brain can actually send messages to begin fatiguing your muscles in an attempt to slow you down. It's basically a self-preservation mechanism kicking in because the brain needs some of that fuel too in order to function.
Carbs are stored in the muscles and liver in the form of glycogen. Glycogen is the most efficient fuel your body burns for energy. Carbs are also loaded with B vitamins, chromium, fiber, iron, magnesium, and phytochemicals (which come from plant nutrients) all of which are important to good health and can even help prevent many cancers.

Pick your carbs wisely. Most of your carb intake should be from complex carbohydrates. Complex carbs are usually from unprocessed, unrefined, whole grains. So instead of white rice, eat brown rice. Instead of white bread each whole grain bread, etc. They take longer for your body to digest and because of this complex carbs will stay with you and provide energy for the long haul. Most of the early part of the carb-loading phase before the race will consist of eating complex carbs.
Simple carbohydrates are food products that are made of processed and/or refined grains. Because they have been processed and refined, they are digested very quickly and provide quick energy. Sugary soft drinks, white rice, sugar, candy, and fruit are examples of simple carbs. Don't avoid simple carbs completely, however. For example fruits are simple carbs, but they are nutrient dense foods that provide many different vitamins as well as fiber. Simple carbs, because they are processed so quickly, do raise the blood sugar levels really quickly. That's why when you eat a candy bar you feel a quick boost of energy, but then soon after crash. Simple carbs tend to have a high GI (a rating using the Glycemic Index) and complex carbohydrates tend to have a lower GI. Foods considered high are 70+ on the GI scale, 56-69 are considered medium, and under 55 are considered low. [Click here] to find out more about the Glycemic Index.

As a runner, eating foods with a lower GI will provide you a better source of energy for the long haul. But simple carbs do have their place. Eating simple carbs shortly before a race can provide quick energy that will be used and if you have stock up prior to the race on complex carbs, you shouldn't feel that crash. Also during the race, using gels and sports drinks (which usually contain a combination of simple and complex carbs) and be used quickly by the body and provide that needed energy later on in the race when your glycogen stores begin to get depleted.
Note: If you are diabetic or have other health concerns, consult with your doctor before making any dietary changes.
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