system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] What ridiculous science fiction gym equipment would Superman have in his Fortress of Solitude?
gpt
It's been shown; ordinary equipment in a room that mimics Krypton.  Superman makes himself 'normal' and trains like an average Kryptonian. iirc when he is injured under these conditions he heals super fast once he gets back to yellow sunlight.  That means he can combat train on a daily basis.