Effect of robotic gait training on cardiorespiratory system in incomplete spinal cord injury.
The objectives in this study were to investigate the effect of robot-assisted gait training on cardiorespiratory fitness in subjects with motor incomplete spinal cord injury and document the exercise intensity of robotic walking in comparison with the recommended guidelines. Ten patients followed a 24-session training program with a robotic gait orthosis in addition to physiotherapy sessions completed within 10 to 16 wk. Cardiorespiratory fitness was determined in a graded arm crank exercise test before and after the training program. To assess the intensity of robot-assisted walking, oxygen consumption (VO2) and heart rate (HR) were measured during a training session early in and at the end of the training program, and exercise intensity measures (percentage of VO2 reserve [%VO2R], percentage of HR reserve [%HRR], and metabolic equivalents [METs]) were calculated. Whereas no changes were found in peak VO2, the resting and submaximal HR at a constant work load were significantly lower after training. Most subjects exercised at low intensity (<30%VO2R, <30%HRR, <3.0 METs), and only two subjects exercised at moderate intensity (>3.0 METs). In spite of the low exercise intensity of the training program and no changes in peak VO2, robot-assisted gait training induced some improvement in cardiorespiratory fitness, as suggested by lower resting and submaximal HR values.
Center for Human Movement Sciences, University of Groningen, University Medical Center Groningen, Antonius Deusinglaan 1, Sector F, Rm 3216-0219, 9713 AV Groningen, the Netherlands. f.hoekstra@umcg.nl.
Femke
F
Hoekstra
Michiel P M
MP
van Nunen
Karin H L
KH
Gerrits
Janneke M
JM
Stolwijk-Swüste
Martine H P
MH
Crins
Thomas W J
TW
Janssen
D000328:Adult; D000368:Aged; D002319:Cardiovascular System / Q000503:physiopathology*; D005081:Exercise Therapy / Q000592:standards; D005260:Female; D005684:Gait; D006801:Humans; D008297:Male; D008875:Middle Aged; D012137:Respiratory System / Q000503:physiopathology*; D012371:Robotics; D013119:Spinal Cord Injuries / Q000503:physiopathology* / Q000534:rehabilitation*; D016138:Walking
aerobic training; cardiorespiratory fitness; exercise; exercise intensity; heart rate; locomotor training; oxygen 
consumption; rehabilitation therapy; robot-assisted gait training; robotic walking; spinal cord injury