A nondimensional normalization scheme for oxygen utilization data

Determination of preferred walking speed on treadmill may lead to high oxygen cost on treadmill walking

“…PWS determined both on the treadmill and on overground did not cause exhaustion during treadmill walking. Oxygen cost, the volume of oxygen taken up per kilogram body weight per unit distance, is a marker of the efficiency of walking [1,15]. Although the preferred walking speed was lower on treadmill, oxygen cost was statistically higher on treadmill walking at treadmill preferred speed (0.158 AE 0.02 ml/kg/m) than walking on a treadmill at overground preferred speed (0.1480 AE 0.02 ml/kg/m) (P < 0.05).…”

“…[1,15]. When we compare the energy cost of walking on a treadmill at a pre-determined overground speed with the energy cost of walking on a treadmill at a pre-determined treadmill speed, we may have a chance to clarify the gait efficiency of both speeds [1].…”

Reproducibility of energy cost of locomotion in ambulatory children with spina bifida

“…Schwartz et al [30] have shown a reduction in variation of energy expenditure in healthy adults and adolescents by calculating a non-dimensional speed, using leg length. In our current randomized clinical trial, we are using this simple modification for the assessment of net nondimensional consumption and cost.…”

Age-related changes in mechanical and metabolic energy during typical gait

“…The difference is only 15% in 9-10-year olds and seems to have disappeared by the age of 12 [18,21], although other authors still report significant differences between adolescents and adults [16,20]. Recently Schwartz et al proposed a new normalization scheme for E met that allows elimination of changes due to the different body dimensions of children and adults which can be invaluable in studying age-related changes [22].…”