Effects of a short-term vegan diet on physical performance, body composition, and well-being in physically active adults – a randomised controlled trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

DRKS

Registry ID

DRKS00039936

Enrollment

Registered

2026-04-15

Start date

2021-11-04

Completion date

Unknown

Last updated

2026-04-27

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

Conditions

No illness/health problem was examined

Interventions

Group 1: Group "Vegan - ad libitum": Phase 1: 4 weeks - Acclimation to physical training, concludes with assessment of physical performance, body composition, and well-being

Phase 2: 2 weeks - Consistent training, documentation of nutrition and well-being, concludes with assessment

Phase 3 (Intervention) - 3 weeks: Consistent training, transition to an ad libitum vegan diet, documentation of nutrition and well-being, concludes with assessment

Phase 4 - 2 weeks: Return to habitual diet, documentation of nutrition and well-being, concludes with assessment Group 2: Group "Vegan - isocaloric": Phase 1: 4 weeks - Acclimation to physical trainin

Phase 3 (Intervention) - 3 weeks: Consistent training, transition to an isocaloric vegan diet, documentation of nutrition and well-being, concludes with assessment

Phase 4 - 2 weeks: Return to habitual diet, documentation of nutrition and well-being, concludes with assessment

Eligibility

Sex/Gender

All

Age

18 Years to 40 Years

Inclusion criteria

Inclusion criteria: healthy, physically active adults

Exclusion criteria

Exclusion criteria: Cardiovascular diseases, metabolic disorders, regular medication use

Design outcomes

Primary

Measure	Time frame
1. Strength performance: Measurement of isometric maximum strength in the leg press and chest press after each phase 2. Endurance performance: Assessment of maximum oxygen uptake via spiroergometry after each phase	—

Secondary

Measure	Time frame
1. Body composition: Measurement of body weight, body fat, and muscle mass using bathroom scales and bioimpedance analysis scales after each phase. 2. Well-being: Assessment of general well-being, sleep quality, and muscular condition via questionnaire during phases 2-4. 3. Dietary intake: Recording of total calorie, carbohydrate, protein, and fat intake, analyzed using software, during phases 2-4.	—

Measure

Time frame

1. Body composition: Measurement of body weight, body fat, and muscle mass using bathroom scales and bioimpedance analysis scales after each phase. 2. Well-being: Assessment of general well-being, sleep quality, and muscular condition via questionnaire during phases 2-4. 3. Dietary intake: Recording of total calorie, carbohydrate, protein, and fat intake, analyzed using software, during phases 2-4.

—

Countries

Germany

Contacts

Public ContactAlexander Pohl

Universität Hildesheim

alex.pohl@live.de+491723916393

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: May 1, 2026