Horne J A, Whitehead M
Experientia. 1976 Sep 15;32(9):1165-7. doi: 10.1007/BF01927604.
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.
12名男性受试者的呼吸频率（RR）每3分钟测量一次，持续6小时。尽管个体差异很大，但大多数受试者的RR呈现出90±15分钟的节律，有几名受试者还表现出60±10分钟和30±3分钟的节律。
