2 Simple Rules on Carbohydrates

Carbohydrate intake is key during races…but it also needs to be a key part of your diet during training. Two simple rules which I’m stealing from Ben Greenfield are below:

1. Don’t Go Hungry. If you are going more than 4 hours between meals, it’s likely that your blood sugar levels are dropping very low. When this happens, and you eventually do eat, you’re more likely to eat more and to eat more carbohydrates. As a result, your blood sugar levels rise more rapidly than usual, resulting in a big surge in insulin levels. So rather than waiting to eat until you’re about to gnaw off your arm, give yourself a rule of snacking or eating at least every 3 hours. By planning, preparing, packaging and pre-cooking, you’ll ensure that you have adequate snacks on hand to make this form of triathlon carbohydrate intake happen.

2. Choose Carbs Wisely. The more quickly a sugar is released into the bloodstream, the faster your insulin levels are going to rise. Some carbs are “quick-release” carbs and include more sport drinks, candy, cookies and sweet tasting compounds. Other carbs, are “slow-release” carbs, and the best ones are lean dairy foods, vegetable carbs like carrots and squash, nuts and seeds, pears, berries and green apples. For proper triathlon carbohydrate intake, choose the quick-release carbs only before, during and after exercise, and use the slow-release carbs the rest of the day.

With these two simple rules, you can suddenly have enormous control over your insulin levels, your health, your performance and your body ­ and although there is obviously much more to consider when it comes to carbohydrate intake, these two rules are a good place to start.



7.39 miles in 54:34 (7:23 min/mile pace)
Avg. HR = 161 bpm
The temperature was only 65°F when I took off this morning, which was a nice break from the usual 75&deg-80°F that I’ve been running in lately. I made an effort to run at a pace that was just above what I would consider comfortable. That being said, my heart rate didn’t really get into zone 4 until the last mile or so. It was in zone 2 (154-162) and zone 3 (163-168) for the majority of my run…and I felt good. Check out my split chart from RunKeeper below:


2 minute warm-up
1/2 mile (864yd) in 16:27 (32:54 min/mile pace)
Total workout: 960yd in 18:48
I signed up for the Tom Sawyer Sprint Triathlon today, which consists of a 1/2 mile swim, so I wanted to see what estimated swim time I should put on the registration. I marked the 15-18 minutes box…which would be a huge improvement over my time from this race in 2008, which was just under 21 minutes.

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