Why should couch potatoes begin exercising at a slower, less intense rate than active individuals?

Because they are not used to doing exercise. If their body is not used to exercise they might get some injuries in bones and muscles.

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Answer(30) days;

Iwould describe it as an overall negative image of themselves.  because they are anorexic, they must sometimes look at themselves as overweight or even obese. however, other people may comment on the being to skinny, which may cause them to see themselves as too skinny at other times.