The influence of different Lokomat walking conditions on the energy expenditure of hemiparetic patients and healthy subjects
| Autor: | Friedemann Müller, Jochen Quintern, Carmen Krewer, Britta Husemann, Eberhard Koenig, Silke Heller |
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| Rok vydání: | 2007 |
| Předmět: |
Male
Orthotic Devices medicine.medical_specialty Biophysics Body weight support Walking Oxygen Consumption Physical medicine and rehabilitation Heart Rate Heart rate medicine Humans Orthopedics and Sports Medicine Treadmill Aged business.industry Rehabilitation Healthy subjects Robotics Middle Aged Gait Oxygen uptake Orthotic device Paresis body regions Energy expenditure Physical therapy Female Energy Metabolism business human activities |
| Zdroj: | Gait & Posture. 26:372-377 |
| ISSN: | 0966-6362 |
| Popis: | To determine the strenuousness and efficacy of therapy, the energy expenditure of 10 healthy and 10 hemiparetic subjects were measured while they walked on a treadmill that was combined with a robot-driven gait orthosis, the Lokomat, which physiologically exercises the legs of a patient on a moving treadmill. Subjects performed different Lokomat conditions after measurement of the baseline, i.e., standing in the Lokomat with 30% body weight support (BWS). Robotic strategies with a position control scheme used fixed gait patterns to produce the following conditions: walking with 100% BWS at a speed of 1 km/h versus 2 km/h and walking with 30% BWS at a speed of 1 km/h versus 2 km/h. Another robotic control option with a force control scheme allowed the force to be reduced on only one leg of the orthosis. In this option a reduction to 60% and to 0% assistance was tested. Oxygen consumption and heart rate were measured by a breath-by-breath respiratory gas analyzing system using standard open circuit methodology. The results for O(2) rate [ml/kg/min] indicate that: (1) walking in the Lokomat is not passive; (2) oxygen uptake is significantly increased due to an effect of loading during active stance phase; (3) speed is not a factor leading to increased oxygen consumption; (4) patients do not significantly increase their oxygen uptake due to the advanced force control scheme. |
| Databáze: | OpenAIRE |
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