Clinical Study

Unilateral Arm Crank Exercise Test for Assessing Cardiorespiratory Fitness in Individuals with Hemiparetic Stroke

Table 3

Comparisons of various parameters at peak exercise in participants with stroke and healthy controls in the leg cycle exercise test.

VariableLeg cycle exercise test
StrokeControl95% CI value
()()

O2 (mL⋅kg−1⋅min−1), mean ± SD13.0 ± 4.619.6 ± 3.6−9.8, −3.2<0.001
Heart rate (bpm), mean ± SD117 ± 20138 ± 7−32, −80.003
Respiratory exchange ratio, mean ± SD1.15 ± 0.181.10 ± 0.12−0.06, 0.180.336
Minute ventilation (L⋅min−1), mean ± SD29.6 ± 13.136.7 ± 11.8−17.0, 2.70.150
Ventilatory equivalent of oxygen, mean ± SD38.3 ± 7.231.5 ± 5.01.8, 11.80.009
Ventilatory equivalent of carbon dioxide, mean ± SD36.0 ± 7.429.9 ± 3.71.4, 11.00.014
End-tidal oxygen fraction (%), mean ± SD16.4 ± 1.115.5 ± 0.90.1, 1.70.028
End-tidal carbon dioxide fraction (%), mean ± SD5.51 ± 0.755.99 ± 0.62−1.0, 0.10.081
Work rate (), mean ± SD55.0 ± 34.692.4 ± 9.2−60.4, −14.50.004
Systolic blood pressure (mmHg), mean ± SD164 ± 24187 ± 16−38, −70.009
Diastolic blood pressure (mmHg), mean ± SD88 ± 1493 ± 16−17, 60.363
Ratings of perceived exertion, median (IQR)13 (13, 15)13 (13, 15)NA0.923
O2 at the ventilatory threshold (mL⋅kg−1⋅min−1), mean ± SD9.5 ± 2.214.7 ± 2.6−7.1, −3.4<0.001
Number of participants who terminated exercise test when achieving 85% of the age-predicted maximal heart rate, (%)6 (37.5)12 (100.0)NA<0.001
Number of participants who achieved the respiratory exchange ratio at peak exercise of 1.10 or more, (%)9 (56.3)8 (66.7)NA0.705
Termination reasons prior to achieving 85% of the age-predicted maximal heart rate, (%)
 General fatigue4 (25.0)0 (0.0)
 Leg muscle fatigue5 (31.2)0 (0.0)
 Diastolic blood pressure > 115 mmHg0 (0.0)0 (0.0)
 Ankle clonus1 (6.3)0 (0.0)

95% CI: 95% confidence interval of the difference between the means (stroke group − control group), IQR: interquartile range, NA: not applicable.