The amount of time you fast depends on your personal preference and goals, in addition to the recommendation of a health professional. If you're pursuing a spiritual fast, then you will adhere to the tenets of your faith. If you are fasting for improved athletic performance, then you might choose to eat less on your off days and more on your heavy workout days, especially if you are an endurance athlete who needs extra fuel. Finally, if you're fasting for weight loss, then you might begin with intermittent fasting, which allows you to eat to satiety but limits when you can eat, helping you reduce calories without feeling deprived. If you're new to fasting, you may want to start with a short-term fast and increase the time between meals if you're able to do so.
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