Ultradian and other rhythms in human respiration rate.
Twelve male subjects had their respiration rate (RR) measured at 3 min intervals for 6 h. Although there were substantial individual differences, most subjects demonstrated a 90 +/- 15 min rhythm of RR, with several subjects also showing 60 +/- 10 min and 30 +/- 3 min rhythms.
D000293:Adolescent; D000328:Adult; D005583:Fourier Analysis; D006801:Humans; D008297:Male; D010507:Periodicity; D012119:Respiration; D013997:Time Factors