Determining the effects of vegan and omnivorous diets on the effects of exercise and the intestinal bacteria population in ultra-marathoners

Vegan vs. omnivore diets paradox: Determining the effects of dietary pattern on exercise-induced symptoms and a whole-metagenomic approach towards defining metabolic networks during the race in ultra-marathoners

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

ISRCTN

Registry ID

ISRCTN69541705

Enrollment

Registered

2020-12-08

Start date

2021-01-01

Completion date

Unknown

Last updated

2023-08-02

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Ultra-marathoners adhering to a vegan or omnivorous diet at least 6 months Not Applicable

Interventions

Participants will be classified as either vegan (no type of animal product consumption - dietary adherence <6 months) or omnivorous (consumption of any animal products - dietary adherence <6 months) b

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Ultra-marathoners with age between 18 to 49 years 2. Competing in the Sri-Chinmoy ultra-marathon race 3. No use of probiotics and antibiotics in the preceding 3 months 4. No history of acute or chronic illnesses

Exclusion criteria

Exclusion criteria: Does not meet inclusion criteria

Design outcomes

Primary

Measure	Time frame
Intestinal microbial adaptation according to applied diet evaluated by analysing faecal samples taken seven days before and seven days after the race using shotgun metagenomic analysis	—

Secondary

Measure	Time frame
Oxidative stress and muscle fatigue-related biomarkers measured using blood samples immediately before, at the end of 0 h, 2 h and 24 h of the race	—

Countries

Switzerland

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026