The influence of different Lokomat walking conditions on the energy expenditure of hemiparetic patients and healthy subjects.
Gait Posture
; 26(3): 372-7, 2007 Sep.
Article
en En
| MEDLINE
| ID: mdl-17113774
ABSTRACT
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.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Paresia
/
Caminata
/
Metabolismo Energético
Tipo de estudio:
Health_economic_evaluation
Límite:
Aged
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Female
/
Humans
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Male
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Middle aged
Idioma:
En
Revista:
Gait Posture
Asunto de la revista:
ORTOPEDIA
Año:
2007
Tipo del documento:
Article
País de afiliación:
Alemania