Arm Crank and Wheelchair Ergometry Produce Similar Peak Oxygen Uptake but Different Work Economy Values in Individuals with Spinal Cord Injury

Table 2

Submaximal () and peak physiological values during arm crank ergometry (ACE) and wheelchair ergometry (WCE) presented as mean and confidence interval (CI) values.

Variables	ACE 30 W ()	WCE 30 W ()	ACE peak ()	WCE peak ()
VO2 (mL⋅kg^−1⋅min^−1)	10.9 (9.9–11.9)	9.0 (7.7–10.3)	27.3 (24.1–30.5)	27.4 (23.6–31.2)
VO2 (L⋅min^−1)	0.87 (0.83–0.92)	0.72 (0.64–0.79)	2.20 (1.98–2.42)	2.20 (1.96–2.44)
VE (L⋅min^−1)	24.2 (22.8–25.7)	18.7 (17.7–22.8)	95.7 (81.7–101.4)	93.9 (75.3–99.4)
RER	0.92 (0.88–0.94)	0.91 (0.87–0.93)	1.19 (1.16–1.25)	1.17 (1.11–1.23)
(mmol⋅L^−1)			11.3 (9.1–13.4)	8.5 (7.6–9.3)
HR	110 (56)	95 (85–109)	179 (168–185)	173 (156–183)
RPE	10 (8–10)	7 (6–8)	18 (17-18)	17 (16–18)
Workload (W)	30	30	130 (111–138)	100 (83–110)

ACE 30 W: ACE at submaximal effort ().
ACE peak: ACE at maximal effort ().
WCE 30 W: WCE at submaximal effort ().
WCE peak: WCE at maximal effort ().
VO₂ (mL⋅kg⁻¹⋅min⁻¹): Oxygen uptake.
VO₂ (L⋅min⁻¹): Oxygen uptake.
VE (L⋅min⁻¹): Pulmonary ventilation.
RER: Respiratory exchange ratio.
(mmol⋅L⁻¹): Non-hemolyzed blood lactate concentration.
HR: beats.⋅min⁻¹.
RPE: Rating of perceived exertion.
Workload: Power output in Watt.
Workload at peak: in Watt.
Level of significance .