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Why do I do sit-ups, when there is stomach cramps and the sour feeling ah?

nguh2010-03-26 10:10:33 +0000 #1

Apple really sweet 呀2010-03-26 10:13:07 +0000 #2
illustrate the effect of abdominal muscles to spend forces, and is a good thing!
simba8109292010-03-26 10:39:33 +0000 #3
is a normal reaction, do not stop, do not do them so far, over a period of time the feeling disappears, and then increase the group number and each number

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