this is simple. u are straining ur neck and not using ur abs when u do ur crunches. i had this problem before. but the proper way to do a basic crunch is 2 relax ur neck and look straight up at the ceiling when u do these never curl ur neck. and flex ur ab muscle. if u cant go up all the way .then its ok. dont break ur form since ur skinny u get abs in no time:p
Is it normal to not be able to get a sixpack??
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this is simple. u are straining ur neck and not using ur abs when u do ur crunches. i had this problem before. but the proper way to do a basic crunch is 2 relax ur neck and look straight up at the ceiling when u do these never curl ur neck. and flex ur ab muscle. if u cant go up all the way .then its ok. dont break ur form since ur skinny u get abs in no time:p