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Posted by: ryangeorgefitness | March 23, 2009

Illustration of why it’s better to lose 1-2 pounds a week

Last week, I wrote about the importance of losing weight slowly and consistently versus a rapid weight loss program. This week, I am going to give an example of what frequently happens when someone loses weight too fast versus someone who does it at a consistent clip.

As I mentioned before, the body is only capable of losing 1-2 pounds of fat per week so any more than that comes from lean body weight which is weight that we don’t want to lose. For this example, we are going to take a person who is 200 pounds and 30% body fat. This means that the person has 140 pounds of lean body weight and 60 pounds of fat. I am going to go through two separate scenarios with this person to show my point.

Scenario 1- This person decides to go on a crash diet or a very low calorie diet. This person could very easily lose 30 pounds over the span of 5 weeks. If we average this weight loss out to 5 pounds a week, then in a best case scenario, this person would have lost 8 pounds of fat and 22 pounds of lean weight.  What results is that this person is actually less healthy at 170 pounds than he was at 200 pounds because his body fat percentage is still 30% and he has lost 22 pounds of valuable lean weight. What makes this example even worse is what happens next. 95% of the time a crash diet will fail within 6 weeks and the person puts back on all of the weight that was lost. In this case, if this person puts back on 30 pounds, he won’t put on 22 pounds of lean weight and only 8 pounds of fat. The likely outcome will be the reverse and he’ll put on 20 pounds of fat weight and 10 pounds of lean weight. The result will be that this person will be back to 200 pounds but with a body fat of 36%. He will have gone from 60 pounds of fat weight up to 72 pounds of fat weight because of the crash diet.

Scenario 2- The same person follows a program which includes a balanced and healthy diet with strength training. If the person is focused on losing 1-2 pounds a week the after 6 weeks, this person will only have lost 10  pounds but it will all be fat weight. After 6 weeks, this person would be 190 lbs but his body fat percentage would have dropped down to 26%. Another 6 weeks and 10 pounds of fat later, his body fat would have dropped to 22% and finally another 6 weeks and 10 pounds later and his body fat would have dropped to 17%.

As you can see, scenario 1 lost 30 pounds in 5 weeks but paid for the rapid weight loss by losing mostly lean weight. He also had the added negative  benefit of gaining back mostly fat. Scenario 2 took 18 weeks to lose 30 pounds, almost 4 times as long but this person was able to lose 12 percent body fat and 30 pounds of fat in that time.

Feel free to comment or ask questions. Any involvement would be greatly appreciated.

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Responses

  1. Ryan,
    Nice blog, nice site! I look forward to you guest-blogging some time in May/early June and will e-mail you shortly with details. I think you have a lot to offer–not only to your NYC market, but to those of out in the wilds of Cincinnati as well!


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