Healthy subjects
Conditions
Interventions
Group 1: Experimental condition without wearing a face mask (no mask). Participants complete a bicycle ergometer test protocol that begins with a resistance of 50 watts and is increased by 25 watts ev
heart rate measurement using 12-lead electrocardiography with adhesive electrodes [Hz]
transcutaneous oxygen and carbon dioxide measurement using a skin sensor (tcPO2/tcPcO2 partial pressure [mmHg]
respiratory rate measurement using a chest belt [N].
The following measurements will be performed at each load level of the step protocol:
Blood pressure measurement using blood pressure cuff [mmHg]
Oxygen level using pulse oximetry [%]
Assessment of possible limited breathing ability using Borg CR-10 scale [values 0 - 10].
Group 2: Experimental condition Mouth-nose-cover without exhaling valve (Community mask). Participants complete
Sponsors
Institut für Arbeitsmedizin, Sozialmedizin und Versorgungsforschung
Eligibility
Sex/Gender
All
Age
18 Years to 67 Years
Inclusion criteria
Inclusion criteria: • Age between 18 and 67 years • Being able to work full shift • no diseases of the metabolism, cardiovascular or respiratory system • written informed consent • medically unobtrusive physical maximum endurance test and pulmonary function test
Exclusion criteria
Exclusion criteria: • acute myocardial infarction (within the last 48 h) • unstable angina pectoris with a high risk of infection • Uncontrolled symptomatic and hemodynamically unstable arrhythmias • Severe symptomatic aortic stenosis • Uncontrolled symptomatic heart failure • Acute myo- or pericarditis • Acute pulmonary embolism or acute pulmonary infarction • Acute aortic dissection • Main stem stenosis • Slight aortic stenosis • Arrhythmias tachyarrythmia, bradyarrhythmia, frequent ventricular extra systoles • Higher atrioventricular block • Severe hypertrophic obstructive cardiomyopathy of an outflow tract • Severe arterial hypertension (systolic BD > 200 mmHg and/or diastolic BD > 110 mmHg) • Electrolyte disorders, especially hyperkalemia, • Physical or psychological impairments, due to which an optimal examination is not possible (e.g. febrile infection) According to (Chatterjee 2017) • diabetes • Acute illness • Under- or overweight (adipositas degree 1) - BMI 30 kg/m² • indications of a disease or disorder of the cardiovascular system assessed by a physical performance test (until subjective exhaustion on a standard bicycle ergometer) • indications of a disease or disorder of the respiratory system assessed by a pulmonary function test • pregnancy
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| difference in physical performance (achieved level/power at the end of a Physical work capacity 130 cycling ergometer protocol) while wearing MNP vs. no mask | — |
Secondary
| Measure | Time frame |
|---|---|
| difference in CO2 partial pressure, O2 saturation, blood pressure, breathing frequency, perceived shortness of breath at the end of the PWC130 cycling ergometer protocol while wearing MNP vs. no mask difference in CO2 partial pressure, O2 saturation, blood pressure, breathing frequency, perceived shortness of breath at the end of the PWC130 cycling ergometer protocol while wearing MNP vs. FFP2exhaul vs. Community mask vs. no mask correlations between the difference in physical performance (MNP vs. no mask) and subjects fitness level associations between the difference in physical performance (MNP vs. no mask) and gender pressure under the mask during normal and forced breathing | — |
Countries
Germany
Contacts
Public ContactBenjamin Steinhilber
Institut für Arbeitsmedizin, Sozialmedizin und Versorgungsforschung
Outcome results
None listed