If you watch a major bicycle race on TV, you have to be impressed by how the riders can eat enough to sustain them through races that require more than five hours of near maximum effort. If they do not get enough food during their ride, they can fall off their bikes, lie on the ground unconscious and start to shake all over in a in a massive convulsion. This is called bonking: passing out from low blood sugar.
Your brain gets almost all of its fuel from sugar in your bloodstream. When your blood sugar level drops, your brain cannot get enough fuel to function properly, you feel tired and confused and can pass out. There is only enough sugar in your bloodstream to last three minutes. To keep your blood sugar level from dropping, your liver must constantly release sugar from its cells into your bloodstream, but there is only enough sugar in your liver to last 12 hours at rest. During intense exercise, your muscles draw sugar from your bloodstream at a rapid rate. Your liver can run out of its stored sugar and your blood sugar level can drop, and you bonk.
Bonking is common in bicycle races if a rider does not eat frequently, but is rare in long distance running races. When you run, your leg muscles are damaged from the constant pounding on the roads and you must slow down. However, you pedal in a smooth rotary motion which does not damage your muscles, so you can continue to pedal at a rapid cadence for many hours.
To prevent your blood sugar from dropping too low during intense exercise lasting more than two hours, eat at least every 15 minutes. It doesn’t matter what you eat: salted peanuts, a peanut butter and jelly sandwich, chicken, an apple, a banana or anything else. Almost all fit people can take small amounts of food frequently during exercise without developing stomach cramps.
Share This Report
This site complies with the HONcode standard for trustworthy health information. Copyright 2015 www.DrMirkin.com
Sports medicine doctor, fitness guru and long-time radio host Gabe Mirkin, M.D., and his wife, nutritionist Diana Mirkin bring you news and tips for your healthful lifestyle. A practicing physician for 50 years more
The Good Food Book
FREE! The Good Food Book: Live Better and Longer with Nature’s Best Foods, by Dr. Gabe Mirkin. With 100 of Diana Mirkin’s delicious, healthful recipes and lists of foods you can eat anytime.
Unable to fetch the feed Error :
A feed could not be found at http://www.facebook.com/feeds/page.php?id=200757859968159&format=rss20. A feed with an invalid mime type may fall victim to this error, or SimplePie was unable to auto-discover it.. Use force_feed() if you are certain this URL is a real feed.