system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do we feel weak (as in not being able to lift a heavy object) when we are laughing a lot?
gpt
Someone may be able to correct me on this, but a good ELI5 would be that our core muscles (Abs and such) play a major role in keeping us upright and maintaining posture, and are even more active when we are also lifting something heavy. When we are laughing uncontrollably a lot of that core muscle activity is now involved in the act of laughing and not maintaining posture, to the point where in particularly intense laughter we might end up doubled over on the floor.