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What's More Important - Exercise or Diet, and Why?

It’s a much debated question, and there are many sides to consider, but perhaps the best answer comes from the ongoing data provided by the National Weight Control Registry (NWCR). As the largest ongoing investigational study of long-term successful weight loss maintenance, the NWCR is currently tracking the exercise and diet habits of over 10,000 individuals. So far, the average NWCR participant has lost an average of 66 pounds, and has kept it off for over five years.

Established in 1994 by Rena Wing, Ph.D from Brown Medical School, and James O. Hill, Ph.D. from the University of Colorado, the NWCR was developed to identify and investigate the characteristics of individuals who have succeeded at long-term weight control.

So, in answer to, “What's More Important - Exercise or Diet?” of the 10,000 NWCR participants:

• 1 percent succeed with exercise alone

• 10 percent succeed with diet alone

• 89 percent succeed with a combination of exercise and diet

As for the “Why?” part of the question, consider these three weight loss fundamentals.

• Losing weight requires a calorie deficit (using more calories than you consume). You can create this deficit by eating fewer calories, by making your body burn a greater number of calories daily, or through a combination of both methods.

• A healthy, portion-controlled diet means you take in fewer saturated and trans fats, added sugars and refined flours, which are conducive to weight gain. In addition, a healthy diet reduces your risk of developing chronic diseases and improves your energy. Losing just five to ten percent of your body weight can have positive health implications. However, portion control is also essential because you could easily overeat even healthy foods - thereby creating a calorie surplus and gaining weight.

• Exercise helps you burn calories and retain lean muscle mass. With physical activity, you burn more energy and can create a bigger calorie deficit. Adding lean muscle mass also helps burn more calories because it is a more metabolically active tissue than fat. (A person with a greater percentage of muscle mass burns more calories at rest.) In addition, when you lose weight, especially quickly, you lose lean muscle tissue along with fat. Then, should you gain weight back, you tend to gain fat. If you consistently lose and regain weight, you end up with a higher percentage of fat than when you started. Exercise can help counteract this problem.

To summarize: On the one hand, you can easily out-eat your best exercise efforts. On the other hand, without dietary control, weight loss will not happen. On top of that, if you do not exercise, you can only cut calories so much, for only so long, before you start to starve your body of essential nutrients and risk damage.

All of which - thanks to the NWCR - brings us to the realization that, given only one option, diet is more important; however, overwhelmingly, the best possible answer is that diet and exercise together are best.


This entry was posted in Health Tips by Dr. Don Colbert.

Don Colbert, MDDon Colbert, M.D. has been board certified in Family Practice for over 25 years and practices Anti aging and Integrative medicine. He is a New York Times Bestselling author of books such as The Bible Cure Series, What Would Jesus Eat, Deadly Emotions, What You Don't Know May be Killing You, and may more with over 10 million books sold. He is the Medical Director of the Divine Health Wellness Center in Orlando, Florida where he has treated over 50,000 patients. He is also a internationally known expert and prolific speaker on Integrative Medicine.

Dr. Colbert is on the Medical Advisory Board for the Fellowship of Christian Athletes. He has been featured on Dr. Oz, The O'Reilly Factor, ABC World News, BBC, Readers Digest, News Week, Prevention Magazine and many prominent Christian TV programs. He is also the TV host of his newly syndicated TV program "Dr Colbert’s Health Report." Dr. Colbert formulated Divine Health to meet the public's demand for higher quality supplementation. Dr. Colbert believes in treating the whole person; the mind, the body and the spirit.

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3 Responses to What's More Important - Exercise or Diet, and Why?

  • Cindy Shotton on April 9, 2013 at 4:35 pm said:

    I can use the exercise bands, but always used the treadmill. I am having problems with my right hip and considering an exercise bike to take the weight off the hip joint. The doc said it is arthristis and bursistis and does not see anything else. I have had 2 shots and am icing the joint for help the pain.

  • James Siglin on April 10, 2013 at 10:10 am said:

    I would like male hormone tips. How can I keep them alive? With food? Thanks.

  • both i am 5'1" am 82.5# very shubby for my ht neds to get rid of fat


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