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by Retric 3332 days ago
Maintaining 1lb of fat is ~2-4calories per day though this increases with activity levels. So, assuming all else is the same over 30 years you would end up around 20-30 pounds heaver.

In the real world exercise is important for regulating appetite which has a much larger impact. Remember, evolution was not optimizing for people to sit around all day long. So, feedback systems are dependent on activity.