Working out on an empty stomach before an evening workout makes you feel less motivated to start and less satisfied afterward, which might make you less likely to keep doing it.

Pro

Against

Evidence from Studies

Supporting (1)

Community contributions welcome

Fasting Before Evening Exercise Reduces Net Energy Intake and Increases Fat Oxidation, but Impairs Performance in Healthy Males and Females

Randomized Controlled Trial

Human

2023 Jan 1

Contradicting (0)

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No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Fasting Before Evening Exercise Reduces Net Energy Intake and Increases Fat Oxidation, but Impairs Performance in Healthy Males and Females

Score: 42

DOI: 10.1123/ijsnem.2022-0132

Similar Assertions

Working out on an empty stomach in the evening makes you feel less motivated, less energetic, and less satisfied afterward — and you can’t perform as well during intense parts of the workout.

88%

Working out on an empty stomach before an evening workout makes you less able to push hard during a short, intense effort.

87%

Skipping a meal before working out in the evening makes people eat less overall during the day, even if they feel hungrier right after exercising.

86%

When you work out in the evening without eating beforehand, your body burns more fat and less sugar for energy during the workout.

80%

Working out on an empty stomach in the evening makes your body burn more fat and less sugar during the workout.

80%