During walking , oxygen consumption ( ml O2/kg/min ) and heart rate ( beats/min ) increased with a higher walking speed and a more proximal amputation .
During walking , oxygen consumption ( ml O2/kg/min ) and heart rate ( beats/min ) increased with a higher walking speed and a more proximal amputation .
OBJECTIVE To systematic ally review the literature on the metabolic costs of activities of daily living ( ADL ) in persons with a lower limb amputation ( LLA ) .
The CAT-CAM socket and quadrilateral socket: A comparison of energy cost during ambulation
Twenty unilateral trans-femoral amputees fitted with either the Contoured Adducted Trochanteric-Controlled Alignment Method ( CAT-CAM ) socket ( n=10 ) or the quadrilateral ( QUAD ) socket ( n=10 ) , and a  “ non-amputee ” control group ( n=10 ) participated in the study . Subjects meeting the following criteria were studied : healthy males between the ages of 18 and 55 years , amputation due to non-vascular pathology , an unaffected sound limb , at least six months use of the test prosthesis , and a minimal stump length of 15 cm . Subjects ambulated in two r and omized trials separated by 20 minutes of rest at 2 assigned speeds : a pace reflecting normal walking speed ( 97 m/min=2.5 mph ) or a slower speed ( 48.5 m/min=1.25 mph ) . Heart rate ( HR ) and Oxygen uptake ( VO2 ) measured during steady state walking were analyzed via two-way ANOVA . Differences among means were further analyzed using Tukey post hoc and simple effects tests . Significant differences were observed between the control group and CAT-CAM subjects with respect to VO2 ( p < 0.05 ) and HR ( p < 0.01 ) at the slower speed . The control group and subjects using the QUAD socket also differed with respect to VO2 ( p < 0.01 ) and HR ( p < 0.01 ) at the slower pace . Faster pace required more energy expenditure ( p < 0.01 ) and produced higher HR ( p < 0.01 ) than slower speeds . At faster pace , a significantly higher energy expenditure in the QUAD than the CAT-CAM group was observed ( p<0.01 ) . It is concluded that ambulating at normal pace using the CAT-CAM socket design uses less energy than when using a QUAD socket design
During walking , oxygen consumption ( ml O2/kg/min ) and heart rate ( beats/min ) increased with a higher walking speed and a more proximal amputation .
During walking , oxygen consumption ( ml O2/kg/min ) and heart rate ( beats/min ) increased with a higher walking speed and a more proximal amputation .
OBJECTIVE To systematic ally review the literature on the metabolic costs of activities of daily living ( ADL ) in persons with a lower limb amputation ( LLA ) .