The effects of the volumetrics diet and time-restricted feeding (16:8) on body composition in physically active middle-aged individuals – a 12-week randomised controlled trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

DRKS

Registry ID

DRKS00033809

Enrollment

Registered

2025-01-09

Start date

2024-01-08

Completion date

Unknown

Last updated

2025-10-06

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

Conditions

No persons with diseases are included

Interventions

Group 1: volumetrics diet - 12-week dietary change to a volumetric diet. Only foods with a low food density (<150kcal per 100g) are allowed. Food ad libitum Group 2: Time-restricted feedings (16:8) -

Eligibility

Sex/Gender

All

Age

30 Years to No maximum

Inclusion criteria

Inclusion criteria: healthy, physically active people of both sexes

Exclusion criteria

Exclusion criteria: Orthopaedic abnormalities in the spine, pelvis, shoulders or legs. In addition, there should be no metabolic or cardiovascular diseases or the need for regular medication. Eating disorders should also be ruled out

Design outcomes

Primary

Measure	Time frame
body weight, fatfree mass, fat mass, body mass index Measurement time points at baseline (T0), 4 weeks (T1), 8 weeks (T2), 12 weeks (T3) via body weight scale and bioelectrical impedance analysis (TANITA BC-601 CG; Tanita Corporation, Tokyo, Japan)	—

Secondary

Measure	Time frame
adherence, waist and hip circumference	—

Countries

Germany

Contacts

Public ContactEduard Isenmann

IST Hochschule für Management

eisenmann@ist-hochschule.de0211866686017

Outcome results

None listed

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