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I used to be able to do 100+ crunches, but now I can only do 40 and my abs feel like they're burning so badly(after). I don't do crunches often anymore. I lost weight(about 5 pounds) before this started happening. I don't have a six pack. Why are my abs burning so bad? Help?

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    Probably because you stopped doing 100+ crunches. Endurance detrains relatively quickly compared to maximal strength, which would be the largest factor in being able to do 100+ crunches. – Alex L Sep 3 '15 at 17:41
  • Good burn or bad burn? :) – Kneel-Before-ZOD Sep 3 '15 at 19:58
  • @Kneel Before Zod Good burn but painful(not literally) – Rob Sterach Sep 3 '15 at 21:05
  • That's good then; if you're performing hundreds of crunches for abs, you're certainly doing something wrong. Abs exercises are not (and are not meant to be) cardio exercises. Also, I'm gonna presume that you were performing the reps faster during the 100+ range than during the 40+ ones. Abs exercises should be done slowly in order to activate the muscles; perform cardio exercises and watch your diet to melt the fat. – Kneel-Before-ZOD Sep 3 '15 at 21:09
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    I would also suspect a form difference. What many call crunches are hip flexions instead. – JohnP Sep 3 '15 at 22:19

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