First, it’s excellent that you’re boosting your activity. It’s no surprise that most Americans need more exercise, but the U.S. Surgeon General reported recently on the extent of the issue: Less than half of U.S. adults get enough physical activity each day to reduce their risk of developing a chronic disease, including diabetes, cancer, or heart or lung disease. Even worse, only one-quarter of teens in high school get enough. So, no matter what the scale says, keep it up.
With weight loss, remember that exercise is only part of the equation, and many studies indicate that it’s a smaller part than you might think. Although both physical activity and eating right play a role, research indicates that reducing calories is far more important in shedding pounds.
It’s easy to overestimate the calories you think you might be burning when you take a nice, brisk walk. Everybody — and every body — is different, but you can go beyond taking a wild guess by using online tools to help you gauge what you might be burning off. One such tool, the Physical Activity Calorie Counter, is available under “Healthy Living” on the website of the American Council on Exercise, acefitness.org. There, you can plug in your body weight and time spent on an activity, and you get an estimate of calories burned. Here are some examples for a 150-pound person:
- A half-hour casual walk (a mile in 30 minutes): 68 calories. That won’t even burn off the 80 calories in one Snickers Fun Size candy bar.
- A half-hour very brisk walk (a mile in 15 minutes): 170 calories, not enough to expend the 240 calories in a 20-ounce bottle of Coca-Cola.
- An hour of very fast cycling (12-13 mph): 544 calories. That’s significant, but it wouldn’t be enough to offset the 430 calories in a Panera Cinnamon Crunch Bagel plus the 130 calories in reduced-fat plain cream cheese you put on it.
Calorie-wise, passing on one or two treats each day adds up. Water is a great zero-calorie choice of beverage, and you’ll want to enjoy just half of your bagel or skip the cream cheese before you jump on your bike. That said, it bears repeating that physical activity in and of itself provides health benefits. How much is recommended?
- Adults should get 150 minutes of moderate-intensity or 75 minutes of vigorous aerobic activity over the course of a week. Moderate activity is enough to increase your breathing and heart rate, but you should still able to talk during the activity. With vigorous activity, such as jogging or running, you can’t say more than a few words without taking a breath.
- Adults also need muscle-strengthening activities that work all the major muscle groups two or more days a week.
- Children should get an hour of moderate-intensity activity every day.
Learn more from the Centers for Disease Control and Prevention at cdc.gov/physicalactivity.
Editor: This column was reviewed by Carol Smathers, Ohio State University Extension specialist in Youth Nutrition and Wellness.
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