Table 5. Assessment of safety of the breath stacking technique.^a .

Variable	First intervention		ΔPost − Pre
	Pre	Post
Borg scale	0.5 ± 0.8	0.2 ± 0.5	−0.3 (−0.7 to 0.1)
SpO2, %	96.1 ± 1.7	97.3 ± 1.40	1.2 (0.5 to 1.8) *
RR, breaths/min	19.1 ± 2.7	19.4 ± 2.8	0.3 (−0.3 to 1.0)
HR, bpm	85.3 ± 9.9	85.6 ± 10.8	0.3 (−1.4 to 1.9)
SBP, mmHg	127.8 ± 15.1	125.6 ± 14.2	−2.2 (−5.9 to 1.5)
DBP, mmHg	82.2 ± 11.7	81.7 ± 11.0	−0.6 (−4.9 to 3.8)
MBP, mmHg	97.4 ± 11.5	96.3 ± 10.9	−1.1 (−4.8 to 2.6)

SBP: systolic blood pressure; DBP: diastolic blood pressure; and MBP: mean blood pressure. ^aValues expressed as mean ± SD or Δ (95% CI). *p < 0.05.