I exercise when convenient but analyze: when should I exercise for optimal sleep? Map exercise timing effects: morning exercise may advance sleep phase, evening might delay or improve depending on person. Calculate: if I moved my workout to optimal time, what's the sleep improvement? Show me the timing experiment: test morning, afternoon, evening for 2 weeks each. Give me the personalized timing: this is when I should exercise based on data. Include: whether my current timing helps or hurts sleep, how to test systematically, and if I need to change workout schedule.