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Moderate continuous versus high-intensity interval training on gut dysbiosis and glucagon-like peptide hormone in irritable bowel syndrome Cover

Moderate continuous versus high-intensity interval training on gut dysbiosis and glucagon-like peptide hormone in irritable bowel syndrome

Open Access
|Mar 2026

Abstract

Introduction

Regular physical activity is critical in maintaining or restoring gut microbiota equilibrium, potentially ameliorating gut dysbiosis (GD) associated with obesity. Our objective is to evaluate and compare the impacts of moderate-intensity interval training (MICT) and high-intensity interval training (HIIT) on GD and glucagon-like peptide-1 (GLP-1) levels in patients with irritable bowel syndrome (IBS).

Materials and methods

Sixty-six participants diagnosed with IBS of both sexes with a body mass index (BMI) of 30–34.9 kg/m2, 30–39 years, prediabetic status and a sedentary lifestyle were randomly and equally assigned into groups A (MICT + low FODMAP diet [LFD]), B (HIIT + LFD) and C (control; LFD only). The intervention lasted for 12 weeks, and training was performed on a treadmill. All groups underwent pre- and post-treatment assessments measuring serum GLP-1 concentrations, faecal short-chain fatty acids (SCFAs), IBS symptom severity (IBS severity scoring system [IBSSS]), quality of life (IBS-QoL questionnaire) and anthropometric parameters, including weight and height.

Results

Significant improvements in BMI, SCFA levels (acetate, propionate and butyrate), IBSSS and IBS-QoL scores (for all p < 0.001) were observed in Group A. In contrast, Group B exhibited significant increases in GLP-1 levels compared to the other groups (p < 0.001).

Conclusions

Both MICT and HIIT, when combined with an LFD, confer distinct benefits in managing IBS. MICT demonstrated superior effects on reducing BMI, improving SCFA profiles and alleviating symptom severity, while HIIT was more effective in enhancing GLP-1 secretion. These findings support the use of tailored exercise interventions based on individual therapeutic goals in IBS management.

Language: English
Page range: 69 - 86
Submitted on: Jun 25, 2025
Accepted on: Nov 7, 2025
Published on: Mar 31, 2026
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2026 Marwa Saeed Mohamed Mansour Salama et al., published by Józef Piłsudski University of Physical Education in Warsaw
This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.