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6 Things to Know About Non-exercise Activity Thermogenesis

6 Things to Know About Non-exercise Activity Thermogenesis

Pete McCall

Your metabolism is always working to burn energy. During periods of higher activity, your body will burn more calories than when you are at rest. (Note: A calorie is just a measure of unit of energy; technically speaking, it’s the energy required to heat one liter of water by one degree centigrade.) But even at rest, your body is always expending energy. How you burn energy or expend calories, which is called the total daily energy expenditure (TDEE), can be organized into three distinct categories:

  1. Basal metabolic rate (BMR; also known as resting metabolic rate, or RMR) is the amount of energy the body uses to support the functions of the organs and physiological systems, and comprises approximately 60-75% of TDEE. The three organs most responsible for burning calories at rest are the liver, brain and skeletal muscle, which burn 27, 19 and 18 percent of the RMR, respectively. It’s worth noting the brain alone uses about one-fifth of your RMR, which helps explain why you don’t think as clearly when you’re hungry.
  2. The thermic effect of food (TEF) is the energy the body uses to convert the food into more energy or to move it to a location to be stored (as fat) for use at a later time, and makes up about 10% of daily energy expenditure.
  3. The thermic effect of physical activity (TEPA) accounts for the remaining energy expenditure—about 15-30% of daily energy output. Included in this number is excess post-exercise oxygen consumption (EPOC), which is the amount of energy the body burns after exercise to return to its normal state.

When it comes to TEPA, there are two different types of activity: planned exercise and the spontaneous non-exercise activities that occur every time you perform some sort of physical exertion, such as standing up from a seated position or running to catch the bus. While exercise is an important form of physical activity that can burn hundreds of calories at a time, other forms of physical activity, called non-exercise activity thermogenesis (NEAT), can play a significant role in helping to maximize the total amount of calories burned in a single day.

Here are six things to know about NEAT and how it can help you reach your health and weight-loss goals:

  1. Lipoprotein lipase (LPL) is an enzyme that plays a critical role in converting fat into energy. Remaining sedentary for long periods of time can reduce levels of LPL. Conversely, using NEAT to move consistently throughout the day can help sustain LPL levels and help the body maintain its ability to burn fat.
  2. Standing can make a difference. A growing body of evidence shows that sitting still for too long can be hazardous to your health. Simply standing is one form of NEAT that can help increase your daily caloric expenditure.
  3. Daily steps add up. The U.S. Department of Health has been promoting 10,000 steps a day as an achievable goal for daily physical activity. Even if you don’t make it to 10,000 steps, adding extra steps to your day is an important component of NEAT that can burn calories, while adding health-promoting activity to your life.
  4. Walk or cycle for transportation. Have you ever been stuck in traffic during your commute and thought, “There has got to be a better way?” By choosing to walk or ride a bicycle for your daily commute, you can burn significant amounts of energy during an activity where most people spend their time sitting. If you take a bus or train as part of your commute, getting off a stop or two early provides a great opportunity for some extra walking. Most errands are run in close proximity to home, so when you need to make that quick run for baking supplies, and time allows, walking to your destination is a great way to increase your NEAT.
  5. There is cleaning and then there is getting-ready-to-host-a-party or have-your-mother-in-law-over-for-dinner cleaning—we all know the difference. Doing additional tasks around the house or putting a little extra effort into your daily chores can be a great opportunity to increase daily NEAT.
  6. Play with your kids. In this modern era of having an app for everything, there is no app for spending extra time with your kids. If you can carve out even a few minutes for playing catch, kicking a ball or walking down to your neighborhood park, you will be spending precious time with your offspring while racking up NEAT. An additional benefit to playing is that it can also help boost neural activity and cognition, so not only are you burning a few more calories, you could actually be increasing your brain function as well.

If losing weight is your primary reason for exercising, NEAT is an essential component of that objective. One pound of body fat can provide approximately 3,500 calories worth of energy. Increasing NEAT by 200 calories (about the equivalent of walking two miles), while also making healthier nutritional choices to reduce caloric intake by 300 calories (the equivalent of a 12-ounce soda and a small bag of potato chips) equals about five hundred fewer calories a day. If you do that seven days a week, you will quickly reach the amount of calories necessary to eliminate a pound of fat. While seemingly small, making the effort to change your daily habits by adding more NEAT along with reducing overall caloric intake creates a foundation for long-lasting weight-loss success.