Display Settings:

Format

Send to:

Choose Destination
Am J Gastroenterol. 2011 Mar;106(3):460-8; quiz 469. doi: 10.1038/ajg.2010.488. Epub 2011 Jan 4.

Physical activity recommendations, exercise intensity, and histological severity of nonalcoholic fatty liver disease.

Author information

  • 1Division of Gastroenterology, Hepatology, and Nutrition, Department of Pediatrics, University of California, San Diego, California 92103, USA.

Abstract

OBJECTIVES:

Factors that determine disease severity in nonalcoholic fatty liver disease (NAFLD) are unclear, but exercise is a recommended treatment. We evaluated the association between physical activity intensity and histological severity of NAFLD.

METHODS:

We conducted a retrospective analysis of adults with biopsy-proven NAFLD enrolled in the NASH CRN (Nonalcoholic Steatohepatitis Clinical Research Network). Using self-reported time spent in physical activity, we classified participants as inactive or as meeting the US guidelines for either moderate or vigorous exercise. Histology was reviewed by a central pathology committee. Frequency and odds of steatohepatitis (NASH) and advanced fibrosis were compared between subjects who either met or did not meet exercise recommendations, and by the total amount of exercise per week.

RESULTS:

A total of 813 adults (males=302, females=511) with NAFLD were included, with a mean age of 48 years. Neither moderate-intensity exercise nor total exercise per week was associated with NASH or stage of fibrosis. Meeting vigorous recommendations was associated with a decreased adjusted odds of having NASH (odds ratio (OR): 0.65 (0.43-0.98)). Doubling the recommended time spent in vigorous exercise, as is suggested for achieving additional health benefits, was associated with a decreased adjusted odds of advanced fibrosis (OR: 0.53 (0.29-0.97)).

CONCLUSIONS:

These data support an association of vigorous but not moderate or total exercise with the severity of NAFLD. Optimal doses of exercise by duration and intensity for the prevention or treatment of NASH have not been established; however, intensity may be more important than duration or total volume.

Comment in

PMID:
21206486
[PubMed - indexed for MEDLINE]
PMCID:
PMC3070294
Free PMC Article

Images from this publication.See all images (1)Free text

Figure 1

Publication Types, MeSH Terms, Substances, Supplementary Concepts, Grant Support

Publication Types

MeSH Terms

Substances

Supplementary Concepts

Grant Support

PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Icon for Nature Publishing Group Icon for PubMed Central
    Loading ...
    Write to the Help Desk