Answered by Dr Itender Pal Singh
This comes up a lot with patients who do morning workouts. My honest answer: for most healthy people, exercising on an empty stomach — often called “fasted exercise” — is not harmful, and some people even prefer how it feels.
Some research suggests fasted exercise may increase fat burning during the workout, though the long-term difference in weight loss compared to eating beforehand appears to be minimal.
Who should be more careful:
- People with diabetes or blood sugar regulation issues
- Anyone doing high-intensity or long-duration workouts, where low energy can cause dizziness or poor performance
- Those who tend to feel lightheaded or nauseous without eating first
My advice: Listen to your body. If fasted workouts feel fine and you perform well, there’s no need to force a pre-workout snack. If you feel weak, shaky, or dizzy, eat something light beforehand.
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