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Yes, fasting during menstruation is possible, but water-only fasting raises dehydration, low energy, and fainting risk for many people.

Yes, lifting weights while fasting is doable for healthy adults when session length, intensity, protein, and hydration are planned.

Yes, you can do strength training while fasting, but plan timing, hydration, and protein to protect performance and recovery.

Yes, sauna during fasting can be safe for healthy adults when you hydrate, shorten sessions, and avoid dry fasts.

Yes, some people with PCOS can use time-restricted eating safely, with medical guidance and a steady, nutrient-dense plan.

Yes, intermittent fasting with diabetes can be safe for some adults when planned with a clinician and matched to your meds and glucose data.

Yes, pairing time-restricted eating with metformin can be safe for many adults when your clinician approves and you watch for low glucose.

Yes, people with diabetes can try intermittent fasting with clinician advice and careful medication adjustments.

Yes, an 11–7 eating window fits a 16:8 pattern: fast for 16 hours and eat during that 8-hour daytime period.

Yes, with your bariatric team’s approval and careful timing, selective fasting can work after a bypass; early healing phases aren’t suited to long fasts.