The fasting window is small, most of it happens during sleep, and the person can eat the same amount of calories each day. 12-hour fasts help sleep.
Alternate-day fasting is intense intermittent fasting and may not be suited for novices or those with specific medical issues. Long-term fasting may be tough.
A 24-hour fast can be difficult and produce weariness, headaches, and irritation. As the body adjusts to this new diet, these symptoms often lessen.
16:8 fasting and 8-hour eating is the Leangains plan. 16:8 diet males fast 16 hours and females 14 hours. If the 12-hour fast failed, this intermittent fast may.
The 5:2 diet involves eating healthily for 5 days and cutting calories for 2 days.
The Warrior Diet involves fasting for 20 hours and eating one huge meal at night. A four-hour eating window is typical.