Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Systolic and diastolic blood pressure at the heart rate of 130 and 150 beats per minute using different face masks. Filled boxplots represent the systolic blood pressure and grey shaded boxplots represent blood pressure at PWC150. SpO2, saturation of peripheral capillary oxygen; PWC, physical working capacity; MedMask, medical face mask; FFP2exhal, filtering facepiece with exhalation valve.
