What question did this study set out to answer?

The study aims to assess the effects of metabolically guided walking combined with plant-based nutrition on body composition and metabolic health in sedentary overweight women.

January 25, 2026Open Access

Metabolically Guided Walking and Plant-Based Nutrition Enhance Body Composition and Weight Loss

Key Points

The study aims to assess the effects of metabolically guided walking combined with plant-based nutrition on body composition and metabolic health in sedentary overweight women.
Participants engaged in a specific walking program based on their respiratory exchange ratio (RER) for 8 weeks.
Women were divided into three groups based on exercise intensity: low, moderate, and high.
Assessment of body composition was conducted using air-displacement plethysmography (BodPod).
Statistical analyses included ANCOVA, mixed-factorial ANOVA, and Pearson correlations.
All participants followed a 2-week dietary lead-in with an energy deficit of ~200 kcal/day.
Percent body fat decreased significantly across participants, with MIIT showing the best outcomes.
MIIT led to reductions in total body mass by 11.2% and fat mass by 25.9%.
Submaximal fitness improved in MIIT, with an increase of 1.487 L·min−1 in VO2 at VT1.
Changes in resting respiratory quotient (RQ) were linked to percent body fat changes, indicating fat oxidation differences among exercise intensities.

Abstract

Sedentary behavior contributes to obesity and metabolic dysfunction, yet few interventions individualize exercise intensity using fuel-based metrics such as the respiratory exchange ratio (RER; VCO2/VO2). This study investigated the effects of metabolically guided walking combined with whole-food, plant-based nutrition on body composition and metabolic outcomes in sedentary overweight and obese women. Forty-four women mean age 43 years; BMI 30.1 kg·m−2) were randomized to low-intensity continuous training (LICT; RER ≈ 0.75), moderate-intensity intermittent training (MIIT; RER ≈ 0.85), or high-intensity continuous training (HICT; RER ≈ 0.95). Following a 2-week dietary lead-in with an individualized ~200 kcal·day−1 energy deficit, participants completed an 8-week RER-guided walking program (5 sessions·week−1; 15–50 min·session−1). Assessments included air-displacement plethysmography (BodPod) body composition, resting metabolic rate and substrate utilization, and oxygen uptake at the first ventilatory threshold (VT1). Data were analyzed using ANCOVA, mixed-factorial ANOVA, and Pearson correlations. Percent body fat decreased significantly across participants (p < 0.0001, η2 = 0.827), with MIIT demonstrating the most favorable integrated outcomes. MIIT elicited the largest reductions in total body mass (−11.2%), fat mass (−25.9%), and percent body fat (−17.1%), alongside improvements in VT1 VO2 (Δ = 1.487 ± 0.895 L·min−1; p = 0.038). Resting respiratory quotient (RQ) declined in LICT and MIIT but increased in HICT, corresponding with increased fat oxidation in LICT and MIIT and reduced fat oxidation in HICT. Changes in RQ were significantly associated with changes in percent body fat (r = 0.316, p = 0.039). Metabolically guided moderate-intensity intermittent walking combined with whole-food, plant-based nutrition produced the most consistent improvements in adiposity, substrate utilization, and submaximal fitness, supporting the public-health feasibility of a community-deliverable, substrate-informed walking prescription.

Metabolically Guided Walking and Plant-Based Nutrition Enhance Body Composition and Weight Loss

Key Points

Abstract

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