Health
posted by Sara .
is it bad to do the same kind of sit ups every night?

That would surely depend upon what kind of sit up you are doing and if you are doing them correctly. Which muscles would that exercise target and is that the only (or are those the only) muscle(s) you wish to strengthen?
Try some of the following links for information:
http://search.yahoo.com/search?fr=mcafee&p=is+it+bad+to+do+the+same+kind+of+sit+ups+every+night%3F+
Sra
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