Physiological response of the human organism during physical exercise under the influence of the circadian rhythm

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

DRKS

Registry ID

DRKS00033719

Enrollment

Registered

2024-04-25

Start date

2024-04-29

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

Cicadian rhythm

Interventions

Group 1: Crossover design: Baseline assessment: demographic and anthropometric data, data on physical activity level, sleep quality and sleep rhythm, body composition data, body temperature, handgrip

Eligibility

Sex/Gender

All

Age

18 Years to No maximum

Inclusion criteria

Inclusion criteria: - Signing the declaration of consent

Exclusion criteria

Exclusion criteria: - Acute infections or orthopaedic problems that make spiroergometric exercise impossible. - Wearing a pacemaker or an ongoing pregnancy, as this makes it impossible to carry out a bioimpedance analysis (BIA) to record body composition. - Metabolic diseases such as diabetes mellitus. - Known cardiovascular diseases such as arterial hypertension, CHD, heart failure, (etc.).

Design outcomes

Primary

Measure	Time frame
Comparison of physiological performance and biological parameters with the same exercise modality during cardiopulmonary exercise on the cycle ergometer depending on the circadian rhythm.	—

Secondary

Measure	Time frame
Prediction of wattage based on physiological and biological data.	—

Countries

Germany

Contacts

Public ContactPhilipp Zimmer

Technische Universität Dortmund, Institut für Sport und Sportwissenschaft, Arbeitsbereich für Leistung und Gesundheit (Sportmedizin)

philipp.zimmer@tu-dortmund.de+49 (0) 231 755 7436

Outcome results

None listed

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