How To Carb Load

May 8, 2009

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After all the hard work you’ve put into training, the last thing you want to do is to sabotage it by making poor food choices leading up to race day. The most important part of your final preparation before a big race is making sure you’re fueled properly in the days and hours before the start.

The average male athlete can store about 1,500 to 1,900 calories of carbs in the blood, liver and muscles combined. Two hours of exercise can deplete glycogen levels. When you train hard almost every day, your body never gets a chance to fully replenish its glycogen stores before the next workout reduces them again.

Carb-loading starts two days before the race. Rest during these two days allows your muscles to build up plenty of glycogen stores when you consume the proper amount of carbs. When you carb-load, you should eat about 10 grams of carbs per kg of body weight daily in the two days leading up to race day. You won’t need as much protein as usual because you won’t be breaking down those muscles. Don’t go an eat a massive bowl of pasta the night before a race and expect a miracle to happen. This will probably just upset your stomach and shock your body.

For example, I’m 85kg. Typically I would eat my regular diet and reduce my training load in the week before a big race. Then two days before the event I would start eating 850grams of pasta or rice per day along with some protein. (One gram of carbohydrate equals 4 calories, so that would be 3400 calories of pasta per day!). I will also do my pre-race warmup routine (3x1min + 3x30sec) the day before the race. This coincidentally agrees with a popular method discovered by the University of Western Australia

A new carbo-loading regimen developed by scientists at the University of Western Australia calls for a normal diet with light training until the day before the race. On the day before the race, the athlete performs a very short, extremely high-intensity workout (such as a few minutes of sprinting) then consumes 12 g of carbohydrate per kilogram of lean mass over the next 24 hours. The regimen reportedly resulted in a 90% increase in glycogen storage.

Follow this routine along with eating properly on the bike you’ll never bonk again.

{ 10 comments }

Haywarm May 8, 2009 at 8:15 am

Great photo!
Very pro.

gordon wansey May 8, 2009 at 12:26 pm

and he has the famous chopping board back in the photo again ….
yes , very PRO !

Chris May 8, 2009 at 9:41 am

That picture is making me hungry and its only 9:41am

Tommy P May 8, 2009 at 11:55 am

Interesting. I think my entire regime consists of light training and carbo loading. It never ceases to amaze me that most beach road bunters out there do “an easy 5 hours in the hills” the day before a race followed by eating an apple or something like that, coz they need to lose 3 more kg to reach their race weight. Dumb.

Mike J May 9, 2009 at 7:25 am

I’ve seen people eat big bowls of spaghetti for breakfast before a big ride. Seems crazy to me but to each his own.

Anonymous May 9, 2009 at 6:43 pm

But I like bonking!

Anonymous May 10, 2009 at 6:51 pm
Anonymous May 10, 2009 at 7:02 pm

The carbohydrate depletion process as the AIS discusses in that article is old, outdated and proven to be ineffective

Farouk Abdul Khalid March 20, 2010 at 6:39 pm

Interesting point. Note 2 days and not the night before the race for carbo load…….

Drew Littlejohns July 29, 2010 at 5:36 pm

Thanks for the great article. I'm doing my first iron man this weekend

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