Winter running breeds some interesting misconceptions, so we decided to get the straight story. Running your car’s air conditioning, like any other feature on your car that draws power, will affect your gas mileage. The primary choices to consider are running the air conditioner with the windows up, or turning off the air conditioner and either using the fan-only setting, or no setting.
With the air conditioning, you’re actually siphoning power away from the engine and using more fuel to keep the air conditioning going. In 2004, the Society of Automotive Engineers took a look at the difference by testing a car in both a wind tunnel and on a desert track in Arizona. The study showed that having the windows down was actually rather bad, especially while driving faster than about 50 to 55 miles per hour. But in 2012, Consumer Reports tested a Honda Accord and found mileage dropping by about 3 miles per gallon when the air conditioner was used and when the car was going 65 miles per hour.
If it is cooler, though, you may want to turn off the air conditioner, especially if you’re traveling under 50 miles per hour. As for the result from Consumer Reports, where going over 65 with the air conditioning on dropped gas mileage by 3 miles per gallon . If you like looking at how cars function under different circumstances, check out Advanced Technology Institute’s Automotive Technology diploma program. DISCLAIMER – Advanced Technology Institute (ATI) makes no claim, warranty or guarantee as to actual employability or earning potential to current, past or future students or graduates of any educational program offered. The amount of calories you burn per mile doesn’t change fundamentally whether you’re running fast or slow, but the amount of calories you burn in the aftermath does change. Figuring out how many calories you burn when running is, on a simple level, a fairly straightforward calculation.
Generally speaking, of course, if you run faster you’ll cover more miles in the same amount of time, which equals more calories burned in that time. A calorie is defined as the amount of energy used to raise the temperature of one gram of water one degree. Technically, though, when it comes to exercise and food, what we refer to as a calorie is really a kilocalorie (equal to 1,000 calories).
Really, then, the simple answer is that you burn about 100 kilocalories per mile of running—which Americans often refer to as calories—and that number will vary depending on your size, efficiency and individual differences.
Running technically involves jumping from foot to foot to propel yourself forward, while both feet never leave the ground in walking. The extra complicating factor is that, although the amount of calories you burn per mile doesn’t change fundamentally whether you’re running fast or slow, the amount of calories you burn in the aftermath does change. One study, Broeder says, suggests that if you burn 720 calories running at 80 percent of your VO2 max, as opposed to burning 720 calories running slower at 60 percent of your VO2max, your base rate of calorie burning will be elevated by 15-25 percent for up to 24 hours. Do Your Own Calculations: Calculate Your Ideal Weight Calculate Your BMI (Body Mass Index) Boston Marathon Find Your Target Heart Rate How Many Calories Do You Need Each Day?
The best way to get new runners off the couch and across the finish line of their first 5K.

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If you sign up for the 30-day ACTIVE Advantage trial membership you'll receive full access to all member benefits during your trial period. This seems to be a popular question I have been reading on forums lately, but no one seems to provide an accurate answer.
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The question is, how much will it affect the mileage, is it enough to warrant not using the air conditioning, and are the alternatives any better?
They tested a full-size sedan and an SUV, so keep in mind that these results might not hold for economy cars, minivans, and other vehicle sizes. Fuel efficiency dropped by a whopping 20 percent when the windows were open, but only by 10 percent when the air conditioner was on.
Now, remember that this is a different class of car with a different engine from what the Society of Automotive Engineers tested, and the test conditions were likely different as well. But assume for the moment that your car is fine and that you’re not limping your way to the nearest gas station, trying to preserve what you have left in the gas tank. There will be less drag from wind at those speeds, which means that less gas will be burned. Most experts (and lots of studies) suggest that a person of average weight burns about 100 calories in a mile of running.
David Swain, a professor of exercise science and the director of the Wellness Institute and Research Center at Old Dominion University. In fact, calories used to be determined by measuring how much a person inside a calorimetry chamber warmed the water surrounding them. The problem is that textbooks used to refer to kilocalories by denoting them as Calories, with a capital C.
That 100 kilocalories is actually net energy burn, or the amount of energy over your baseline metabolism, since we’re always burning calories, even when we’re just sitting. Other studies have been less conclusive in the number, but consistently find that more intense exercise leads to a greater after-burn effect. Generally, a non-elite runner can only do a really intense running workout maybe once or twice a week at risk of getting injured from the higher intensity.
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When the 30 days of the trial are up, your benefits will automatically upgrade to the annual membership which currently costs $69.95 per year. The discount amount will display in your shopping cart and will be deducted from your registration fees. The answers vary between car models, as well as between individual people because driving habits change from person to person.
Part of the test also included driving in a crosswind, which is something many drivers encounter. If it is hot out to the point where you can’t deal with being in the car, or if you or a passenger have health problems related to or exacerbated by the heat, turn on the air conditioner.
That number goes up slightly if you weigh more or if you’re a less efficient runner—both of which require that you use more energy to cover the same distance. Over many studies, it was determined that there was a direct relation between the amount of oxygen the person in that chamber consumed and the amount of calories burned. Eventually, Americans just started referring to them as calories and now almost all Americans call them calories, instead of kilocalories.
In fact, some studies suggest that walking faster than 12-minute miles actually burns more calories than running a 12-minute mile. You’re not at a resting state, and so you’re burning more calories than you would otherwise. Or, you risk burning out and not being able to do as much running, which then actually burns less calories. If you decide during the trial period that you don't want to continue the membership, just let us know.
When logged in as an Advantage member, your discount will automatically apply at the end of registration. Good, master-certified automotive technicians should know what to consider if a customer asks whether running the air conditioner will be bad for mileage on that customer’s particular car.
That, then, saves researchers a lot of effort and now they simply measure the amount of oxygen a person consumes, and the carbon dioxide they produce. Otherwise, at the end of your 30 day trial we will extend your member benefits for a full year at the current annual membership fee. It’s loud and can get rather annoying after a while, but that’s a personal preference that you have to decide for yourself!

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