It depends on the case; there is no single guideline.
Effect by goal · level of evidence
Body composition and cardiometabolic health
improvesModeratemeta-analysis (AAA)
Meta-analysis: combining exercise with intermittent fasting provides added benefits for body composition and cardiometabolic health compared with doing only one of the two. A good combined strategy for losing fat and improving markers.
Body composition and cardiometabolic health — improves (Moderate, meta-analysis). Meta-analysis: combining exercise with intermittent fasting provides added benefits for body composition and cardiometabolic health compared with doing only one of the two. A good combined strategy for losing fat and improving markers. 38183054
Information, not medical advice. Prescription drugs require a doctor.
Information, not medical advice. Scientific evidence reflects the quality of the studies.