Comparison of cardiopulmonary function changes during wheelchair propulsion: Backrest angle

Abstract

[Purpose] Changes in cardiopulmonary function during wheelchair propulsion on a treadmill were measured using wheelchairs according to backrest angle adjustment. [Methods] Twenty-two healthy male subjects were the subjects. Oxygen consumption (VO 2, ml/min), heart rate (HR, beats/min), carbon dioxide emissions (VCO 2, ml/ min), oxygen uptake per body weight (VO 2, ml/kg/min), and respiration frequency (Rf) were used as the measurement variables for cardiopulmonary data. [Results] The peak value, average value and value at rest were compared. When resting, the value did not differ except for VO 2, and the peak value, did not differ except for VCO 2. However, the average value in all except VO 2/kg (at 13 degrees) was significantly lower than 3 degrees (93°). [Conclusion] A 13° wheelchair backrest angle (103°) provides a lower cardiopulmonary workload than the base angle (3°). A training program for good seating and posture needs to be provided.