system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 How does exercise help with mental health issues like depression and anxiety?
gpt
Immediately, endorphins. They decrease perception of pain, increase euphoria, modulate your appetite, and ‘boost’ your immune system (among other things). Over time, the positive benefits of exercise (better sleep, life satisfaction from sticking to something you consciously know is beneficial) encourage you to stick to it.