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

42

Pro

0

Against

Evidence from Studies

Supporting (1)

42

Community contributions welcome

42

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

This study found that if people fast for 7 hours before riding a bike in the evening, they burn more fat and less carbs during the ride — exactly what the claim says.

Contradicting (0)

0

Community contributions welcome

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

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

42

0

99%

Working out before eating breakfast burns about 3 grams more fat than working out after eating, because your body has to use stored fat for energy when you haven’t eaten.

46

0

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.

42

0

82%

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.

42

0

80%

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

42

0

80%