showlett wrote:My stomach muscles sometimes cramp/lockup after doing a minimal amount of sit-ups. The muscles will tighten so badly that I have to lay flat and wait for them to relax before I can continue. I've done sit-ups my whole life and much more aggressively, but never had this problem until a couple of years ago, and it's not consistent. Could it be age, or something else? Someone suggested dehydration to me once, but I drink plenty of water.
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