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both resistance training must be occurring at some point for your muscle mass to be
                  preserved in the face of a caloric deficit.

                  While  long  term caloric restriction on its own can cause you to lose muscle mass

                  (such is the case with hospital patients who are on a low-calorie diet and confined to
                  bed  rest),  the  combination  of  caloric  restriction  with  resistance  exercises  has  been
                  proven to be very effective at preserving your muscle mass.

                  Research published in 1999 found that when men and women followed a 12 week diet
                  consisting of only 800 calories and around 80 grams of protein per day, they were able

                  to  maintain  their  muscle  mass  as  long  as  they were exercising with weights three
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                  times per week.

                  In  another  study published in 1999, obese men restricted their caloric intake by

                  eating 1,000 calories less per day than they normally ate for 16 weeks. They took part
                  in a weight-training program three days a week and were able to maintain all of their
                  muscle mass while losing over 20 pounds of body fat!
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                  In yet another study, 38 obese women undertaking a reduced-calorie diet for 16 weeks
                  were also able to maintain their muscle mass by training with weights three times per

                  week.
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                  As long as you are using your muscles, they will not waste away during short periods
                  of dieting. From my experience in the sports supplement industry, I can tell you that

                  drug-free bodybuilders and fitness athletes constantly undergo 16- to 20-week periods
                  of very-low-calorie diets while maintaining all of their muscle mass as they prepare for
                  bodybuilding contests.

                  The muscle preserving effects of exercise are even evident in older populations. When
                  29 men and women between the ages of 60 and 75 dieted for 4 months, the group that


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