Exploring immediate cardiorespiratory responses: low-intensity blood flow restricted cycling vs. moderate-intensity traditional exercise in a randomized crossover trial

Table 2 Mixed linear models on mean difference in VE and secondary end-points between traditional endurance exercise (TRA-65) and blood-flow restriction endurance exercise (BFR-50)

	TRA-65 (n = 26)	BFR-50 (n = 24)	Mean differences (n = 24)	% Differences	P- Value
Primary end point
VE L/min	51.0 (11.33)	47.8 (11.26)	-3.1 (-4.4 to -1.7)	-6.1 ( -8.62 to -3.38)	< 0.001
Secondary end points
VO₂ mL/min/kg	24.86 ( 5.97)	22.02 (5.10)	-2.66 (-.3.44 to -1.87)	-12.2 (-8.9 to -15.6)	< 0.001
VO₂ L/min	1.82 (0.44)	1.59 (0.40)	-0.22 (-0.28 to -0.16)	-14.1 (-16.4 to -11.9)	< 0.001
VCO₂ L/min	1.78 (0.42)	1.52 (0.35)	-0.25 (-0.29 to -0.20)	-8.7 (-10.7 to -6.8)	< 0.001
VT L	2.07 (0.51)	1.88 (0.51)	-0.20 (-0.25 to -0.15)	3.9 (1 to 6.8)	< 0.001
BR (breaths per min)	25.4 (4.9)	26.6 (6.1)	1.3 (0.5 to 2.2)	-4.5 (-6.6 to -2.5)	0.003
Heart rate (bpm)	130.7 (14.0)	124.7 (17.6)	-6.0 (-8.6 to -3.4)	0.6 (0.4 to 0.8)	< 0.001
SpO₂ (%)	95.1 (1.2)	95.7 (1.3)	-0.6 (-0.8 to -0.4)	35.3 (27 to 35.3)	< 0.001
RPE leg (0–10)	4.5 (1.6)	5.9. (2.1)	1.3 (1.0 to 1.7)	-19.8 (-34.7 to -4.5)	< 0.001
RPE breathing (0–10)	4.6 (1.4)	- 3.6 (1.5)	-0.9 (-1.2 to -0.6)	-12.2 (-8.9 to -15.6)	< 0.001

Data are presented as means and standard deviations, mean differences with corresponding 95% confidence intervals and percent differences with corresponding 95%. Positive coefficients indicate that traditional exercise gave larger measurements than BFR exercise
Abbreviations: VE Ventilation, VO₂ Oxygen consumption, VCO₂ Carbon dioxide output, VT Tidal volume, BR Breathing rate, SpO₂ Peripheral oxygen saturation, RPE leg Rating of perceived leg exertion on a scale of 0 to 10 (0 no fatigue; 10 maximum fatigue), RPE breathing Ratings of perceived breathing on a scale of 0 to 10 (0 no shortness of breath; 10 maximum shortness of breath)

ISSN: 2052-1847