I have the same irrational fear and have for the last 11 years- however, NOT resting leads to injury and burnout. If you feel like you NEED to take some time off, you probably should. Personally, I think a whole week every six weeks is too much, but every 10-12 weeks, 5 days or so is a good idea.
You won't lose muscle or gain weight. Eat sensibly and don't make it a free for all food week and you'll be fine.
Gee, I should take my own advice!
Mel
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