It’s a hot July afternoon and the Tour is humming on the TV.
The commentator drops the famous 8,000 calories a day line like it’s no big deal.
That phrase about how many calories do Tour de France riders burn has a way of sticking around after the stage ends.
Here’s what the numbers really say, plus what they mean for your own Saturday spin.
What Scientists Actually Measured in a Grand Tour
We’ve all joked that a big ride earns an extra slice of pizza.
The pro version of that joke is on another level.
It comes from a Giro d’Italia study that’s tracked daily burn across the whole race.
The average landed at about 7,720 calories per whole day.
And that’s about 8,320 calories a day in the final week.
Why Per Stage Is the Wrong Question
It’s tempting to think that’s all pedaling, but it isn’t.
Think of it like a power bill for the whole house, where riding’s the big air conditioner but not the only thing plugged in.
That number covers the whole 24 hours, not just the riding, so don’t think of it as on-bike only.
Here’s the fun twist that shows how pricey speed gets.
The team’s fastest rider used about a third more energy per pound per day than the slowest while riding only about 5.6% faster.
Sheltering in the bunch saves energy, and that’s part of how fast the peloton goes.
How Pros Eat More Than 7,000 Calories in a Day
You can’t eat 7,000 calories with a knife and fork at dinner, and pros don’t try.
Much of the food is eaten on the bike.
That’s a big jump to about 90 to 120 grams of carbs an hour or more, up from about 30 to 60 grams an hour before 2010.
It comes from a carb fueling review.
Related:
The 58-Year-Old Who Out-Burned a Pro
Here’s where your café ride gets bragging rights.
A 58-year-old recreational rider took on the full 2023 Tour route.
The details are in this Tour route rider study.
He averaged an estimated 8,580 calories a day versus 7,098 for a 28-year-old pro.
He didn’t ride faster, he just rode longer at about nine hours a day versus about four for the pro.
More saddle time adds up fast.
Related:
Your Ride Compared to a Pro Race Day
Your computer already knows your number, even if you don’t.
The kilojoule number on a power meter roughly equals calories burned.
If you’re a 180-pound rider out for two hours at 12 to 14 mph, you’ll hit about 1,300 calories in total.
One average pro race day equals about six of those two-hour rides.
Put that way, your Saturday loop looks pretty sensible, and that’s good news for lunch.
Fuel for the ride you’re doing, not the Tour you’re watching.
Don’t copy a pro menu, start with eating on long summer rides for your own plan.
The practical next step is small.
On your next ride over 90 minutes, note kilojoules or time and you’ll see how you feel in the final 30 minutes.
Don’t ride emptier, add a little more food next time if you fade.
If weight’s the goal, start with losing belly fat while cycling instead of eating like a pro.
Pro Cyclist Calorie Questions, Answered
How many calories does a Tour rider burn in a day?
They’re big numbers, and they’re for the full day, sleep included.
In the Giro study, that’s about 7,720 calories across the race for the full day.
And that’s about 8,320 in the final week.
A 1980s Tour estimate averaged about 6,070, with the hardest day averaging about 7,815.
Do pros lose weight during a Grand Tour?
Most of the men held steady.
The Giro riders held weight across 24 days, and that’s the same as four Tour riders in a 1986 study.
How many carbs per hour do pros eat on stages?
They’re taking 90 to 120 grams per hour or more.
How many calories does a two-hour bike ride burn?
For a 180-pound rider at 12 to 14 mph, it’s about 1,300 calories in total.
By power, that’s 150 watts for two hours for 1,080 kilojoules, about 1,080 to 1,300 calories depending on efficiency.
So that’s one average Giro race day equal to roughly six of those rides.
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