Does exercise training help reduce liver fat in people with nonalcoholic fatty liver disease?
Exercise training is an effective non-drug strategy for reducing liver fat in people with nonalcoholic fatty liver disease (NAFLD). A large meta-analysis of 38 studies found that exercise significantly lowered intrahepatic lipids compared to no exercise 4. The type of exercise matters: high-intensity interval training (HIIT) and aerobic training appear most effective, while resistance training has a smaller effect 4. Combining exercise with dietary changes, such as alternate day fasting, may produce even greater reductions in liver fat 5.
What the research says
A 2025 meta-analysis of 38 randomized controlled trials involving 1,880 adults found that exercise training significantly reduced intrahepatic lipid content (a measure of liver fat) compared to no exercise 4. The analysis ranked exercise types by effectiveness: high-intensity interval training (HIIT) was most likely to lower liver fat, followed by aerobic training, then combined aerobic and resistance training, with resistance training alone being least effective 4. Exercise also improved fasting blood glucose and insulin levels, which are important for metabolic health in NAFLD 4. A separate 2016 randomized trial in 220 adults with NAFLD compared moderate exercise (brisk walking 150 minutes per week) to a combination of vigorous and moderate exercise (jogging and walking). Both exercise groups reduced liver fat, but the vigorous-moderate group showed greater improvements in metabolic risk factors 6. Another 2023 trial in 80 adults with obesity and NAFLD found that combining alternate day fasting with moderate aerobic exercise reduced liver fat by 5.48% over 3 months, significantly more than exercise alone (1.30% reduction) or a control group 5. This suggests that adding dietary changes can boost the effects of exercise. While some sources discuss other interventions like the Mediterranean diet or dihydromyricetin, they do not directly address exercise training 37. Overall, the evidence consistently supports exercise as a key lifestyle treatment for NAFLD.
What to ask your doctor
- What type and intensity of exercise would be safest and most effective for my NAFLD?
- How many minutes per week of aerobic or high-intensity interval training should I aim for?
- Would combining exercise with dietary changes, such as intermittent fasting or the Mediterranean diet, help me more?
- How often should I have my liver fat and liver enzymes checked to monitor progress?
- Are there any precautions I should take before starting a new exercise program, given my other health conditions?
This question is drawn from common patient questions about Gastroenterology and answered using cited medical research. We do not provide individualized advice.