16:8 is the rule but analyze: is that window necessary? Map fasting windows: 16:8 vs. other windows vs. my schedule. Calculate: strict 16:8 vs. flexible window vs. adherence. Show me the window reality: fasting window should fit your life. Give me the truth: rigid 16:8 might not suit me. Include: whether 16:8 necessary, what window fits my life, if flexibility helps.