Table 1.

Cerebral blood flow, respiration rate, and heart rate means (SEM) across conditions and sessions

	CBF	Respiration rate	Heart rate
Session 1
Rest: neutral	74.12 (3.01)	19.97 (1.29)	72.53 (2.33)
Rest: heat	71.51 (2.93)	20.45 (1.11)	74.79 (2.39)
ATB: neutral	70.69 (3.56)	17.05 (1.00)	70.46 (1.79)
ATB: heat	67.90 (3.08)	19.32 (1.33)	74.07 (2.19)
Session 2
Rest: neutral	68.57 (3.17)	16.72 (0.82)	74.82 (3.08)
Rest: heat	66.82 (2.59)	17.12 (0.93)	77.32 (2.95)
Meditation: neutral	65.09 (3.59)	11.55 (0.74)	73.62 (2.77)
Meditation: heat	65.47 (3.86)	9.47 (0.67)a	75.38 (2.70)

CBF was lower when subjects were instructed to attend to the breath (n = 15). However, there were no differences between rest and ATB in session 1 or between rest and meditation in session 2.

^aRespiration rate during heat stimulation and meditation was significantly lower than all other conditions (n = 10). Heat stimulation increased heart rate when compared with neutral stimulation (n = 9).