Assessment of functional impairment after knee anterior cruciate ligament reconstruction using cardiorespiratory parameters: a cross-sectional study

Table 1 Physiological responses in non-involved and involved limb submitted to a cycling exercise with same absolute intensity

Variable	Uninvolved limb	Involved limb	P	Effect size
$\dot{V} O_{2} (mL / \min)$	1680.4 ± 335.9	1802.7 ± 357.4*	0.02	-0.17
$\dot{V} C O_{2} (mL / \min)$	1679.1 ± 259.4	1865.9 ± 314.8*	0.005	-0.30
$\dot{V} E (L / \min)$	54.1 ± 7.8	67.8 ± 15.4*	0.02	-0.49
Vt (L)	2.1 ± 0.4	2.2 ± 0.4	0.47	-
f (bpm)	26.4 ± 6.6	32.2 ± 9.6*	0.048	-0.33
$\dot{V} E O_{2}$	31.7 ± 7.4	36.7 ± 8.8*	0.047	-0.30
$\dot{V} EC O_{2}$	31.1 ± 6.2	34.9 ± 6.1	0.08	-
PetO₂ (mmHg)	99.6 ± 6.4	103.8 ± 5.8*	0.03	-0.32
PetCO₂ (mmHg)	36.3 ± 5.7	33.0 ± 4.9*	0.04	0.30
HR (beats.min^-1)	149 ± 16	162 ± 21*	0.005	-0.33

Data are expressed as mean ± standard deviation; *Statistically significant difference in relation to non-involved limb (p < 0.05). $\dot{V} O_{2}$ : oxygen uptake, $\dot{V} C O_{2}$ : carbon dioxide production, ${\dot{V}}_{E}$ : minute ventilation, f: breathing frequency, V_T: tidal volume, ${\dot{V}}_{E} O_{2}$ : ventilatory equivalent for O₂, $\dot{V} EC O_{2}$ : ventilatory equivalent for CO₂, P_ETO2: end-tidal pressure of O₂, P_ETCO2: end-tidal pressure of CO₂ and HR: heart rate.

ISSN: 1471-2474