Cited by 117Liver Disease Diagnosis and TreatmentAlcohol Consumption and Health EffectsDiabetes, Cardiovascular Risks, and Lipoproteins

Lifestyle changes in patients with non-alcoholic fatty liver disease: a systematic review and meta-analysis

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Fernández, Tiziana, Viñuela, Macarena, Vidal, Catalina, Barrera, Francisco·2022·PLoS ONE

Abstract

BACKGROUND: Non-alcoholic fatty liver disease is a liver condition that is increasing worldwide and expected to become the number one cause of cirrhosis and hepatocellular carcinoma in the next 5 years. Currently there are no successful or approved pharmacological treatments. Weight loss is the first-line therapy as a 7 to 10% reduction improves steatosis, inflammation, hepatocyte ballooning, and fibrosis. To achieve this, lifestyle interventions including daily exercise and diet must be encouraged. We aimed to assess the effects of diet, exercise, or a combination of both compared to conventional treatment in patients with non-alcoholic fatty liver disease. METHODS AND FINDING: A literature search was performed in CENTRAL, EMBASE, and PubMed. Randomized controlled trials comparing lifestyle changes with conventional treatment were included, without date restriction. Two authors searched studies according to eligibility criteria, extracted data, and assessed study quality. Subgroup analysis was made by type of intervention, duration of intervention and supervision. We calculated mean differences between the intervention and the control group with their corresponding 95% confidence intervals. Quality of the evidence was assessed using the Cochrane Risk of bias tool. This study is registered in PROSPERO, number CRD42020184241, and checked with the PRISMA checklist. 30 RCTs met the inclusion criteria. Compared to conventional treatment, combined exercise with diet seems to elicit greater reductions in ALT (MD: -13.27 CI 95% -21.39, -5.16), AST (MD: -7.02 CI 95% -11.26, -2.78) and HOMA-IR (MD: -2.07 CI 95% -2.61, -1.46) than diet (ALT MD: -4.48 CI 95% -1.01, -0.21; HOMA-IR MD: -0.61 CI 95% -1.01, -0.21) and exercise (ALT and AST non-significant; HOMA-IR MD = -0.46 CI 95% -0.8, -0.12) alone. Additionally, exercise improved quality of life, cardiorespiratory fitness, and weight (MD: -2.64 CI 95% -5.18, -0.09). CONCLUSION: Lifestyle changes are effective in the treatment of NAFLD. Diet and exercise combined are superior to these interventions alone in improving liver enzymes and HOMA-IR.

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  1. [36]Hallsworth K, Hollingsworth KG, Thoma C, Jakovljevic D, MacGowan GA, Anstee QM, et al. P33 Cardiac function improves following high intensity intermittent exercise in adults with non-acoholic fatty liver disease. Diabet Med. 2013; 30: 30– 201.
  2. [51]Yao J, Meng M, Yang S, Li F, Anderson RM, Liu C, et al. Effect of aerobic and resistance exercise on liver enzyme and blood lipids in Chinese patients with nonalcoholic fatty liver disease: a randomized controlled trial. Int J Clin Exp Med 2018; 11(5): 4867– 4874

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Authors
Fernández, T., Viñuela, M., Vidal, C., & Barrera, F.
Affiliations
Pontificia Universidad Católica de Chile (CL)
Corresponding author
Fernández, Tiziana
Venue
PLoS ONE
Published
2022-02-17
Volume
17
Issue
2
Pages
e0263931
ISSN
1932-6203 (ISSN-L)
OpenAlex
W4213043394
Cited by
117
References
95
Citations by year
2026: 18 · 2025: 33 · 2024: 29 · 2023: 29 · 2022: 8
FWCI
3.93
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Fondo Nacional de Desarrollo Científico y Tecnológico (1191183)
Topics
  • Health Sciences › Medicine › Epidemiology › Liver Disease Diagnosis and Treatment
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Alcohol Consumption and Health Effects
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
Keywords
non-alcoholic fatty liver disease, lifestyle intervention, diet, physical activity, weight loss, alanine aminotransferase, aspartate aminotransferase, HOMA-IR, insulin resistance, quality of life, cardiorespiratory fitness, conventional therapy comparison, steatosis, fibrosis, hepatocellular carcinoma risk, cirrhosis risk, hepatocyte ballooning
MeSH terms
Humans, Life Style, Quality of Life, Weight Loss, Exercise, Non-alcoholic Fatty Liver Disease

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