%0 Journal Article %1 Keefer2005a %A Keefer, Daniel J %A Tseh, Wayland %A Caputo, Jennifer L %A Apperson, Kathy %A McGreal, Sheri %A Morgan, Don W %D 2005 %J Gait Posture %K Adolescent; Analysis of Variance; Cerebral Palsy; Child; Cohort Studies; Energy Metabolism; Exercise Test; Female; Hemiplegia; Humans; Male; Musculoskeletal Physiologic Processes; Oxygen Consumption; Physical Endurance; Probability; Walking %N 1 %P 80--84 %R 10.1016/j.gaitpost.2004.01.004 %T Within- and between-day stability of treadmill walking VO2 in children with hemiplegic cerebral palsy, stability of walking VO2 in children with CP. %U http://dx.doi.org/10.1016/j.gaitpost.2004.01.004 %V 21 %X Within- and between-day stability in locomotor energy use was quantified in 13 children with hemiplegic cerebral palsy (CP). During testing, subjects were familiarized with the laboratory environment (Session 1), performed three 5 min level treadmill walks (Trials 1-3) at 0.67 m*s(-1) (Session 2), and completed a single 5 min walk (Trial 4) at 0.67 m*s(-1) (Session 3). In Sessions 2 and 3, heart rate (HR) was assessed and expired air was collected and analyzed to determine VO2. Data analyses revealed no significant difference (P > 0.05) in either net VO2 (ml kg(-1)*min(-1)) or EEI(HR) (b*m(-1)) across the three trials performed in Session 2 and between average measures of net VO2 and EEI(HR) quantified in Session 2 and those obtained in Session 3. Mean within-day coefficient of variation (CV) values for net VO2 and EEI(HR) were 8.6\% +/- 8.5\% and 13.9\% +/- 7.8\%, respectively. Analysis of between-day variability and energy expenditure revealed a between-day CV value of 13.1\% for net VO2 and 24.0\% for EEI(HR). In addition, significant inverse relationships between Gross Motor Function Measure (GMFM) scores and within- (r = -0.61) and between-day (r = -0.58) CV values for net VO2 were detected. Viewed in concert, these data suggest that fairly stable within- and between-day measures of locomotor energy expenditure during level treadmill walking can be achieved in subjects with hemiplegic CP if testing is preceded by a short period of treadmill accommodation. However, children with greater motor dysfunction may require an extended period of treadmill accommodation to reduce trial-to-trial variability in walking energy use.

@article{Keefer2005a, abstract = {Within- and between-day stability in locomotor energy use was quantified in 13 children with hemiplegic cerebral palsy (CP). During testing, subjects were familiarized with the laboratory environment (Session 1), performed three 5 min level treadmill walks (Trials 1-3) at 0.67 m*s(-1) (Session 2), and completed a single 5 min walk (Trial 4) at 0.67 m*s(-1) (Session 3). In Sessions 2 and 3, heart rate (HR) was assessed and expired air was collected and analyzed to determine VO2. Data analyses revealed no significant difference (P > 0.05) in either net VO2 (ml kg(-1)*min(-1)) or EEI(HR) (b*m(-1)) across the three trials performed in Session 2 and between average measures of net VO2 and EEI(HR) quantified in Session 2 and those obtained in Session 3. Mean within-day coefficient of variation (CV) values for net VO2 and EEI(HR) were 8.6\% +/- 8.5\% and 13.9\% +/- 7.8\%, respectively. Analysis of between-day variability and energy expenditure revealed a between-day CV value of 13.1\% for net VO2 and 24.0\% for EEI(HR). In addition, significant inverse relationships between Gross Motor Function Measure (GMFM) scores and within- (r = -0.61) and between-day (r = -0.58) CV values for net VO2 were detected. Viewed in concert, these data suggest that fairly stable within- and between-day measures of locomotor energy expenditure during level treadmill walking can be achieved in subjects with hemiplegic CP if testing is preceded by a short period of treadmill accommodation. However, children with greater motor dysfunction may require an extended period of treadmill accommodation to reduce trial-to-trial variability in walking energy use.}, added-at = {2014-07-19T20:35:42.000+0200}, author = {Keefer, Daniel J and Tseh, Wayland and Caputo, Jennifer L and Apperson, Kathy and McGreal, Sheri and Morgan, Don W}, biburl = {https://www.bibsonomy.org/bibtex/26abc5aebac2ff1a7b927c86d5ad9ee71/ar0berts}, doi = {10.1016/j.gaitpost.2004.01.004}, groups = {public}, interhash = {152b6dd5cddcb187dbe4e5a64df11dbc}, intrahash = {6abc5aebac2ff1a7b927c86d5ad9ee71}, journal = {Gait Posture}, keywords = {Adolescent; Analysis of Variance; Cerebral Palsy; Child; Cohort Studies; Energy Metabolism; Exercise Test; Female; Hemiplegia; Humans; Male; Musculoskeletal Physiologic Processes; Oxygen Consumption; Physical Endurance; Probability; Walking}, month = Jan, number = 1, pages = {80--84}, pii = {S0966636204000190}, pmid = {15536037}, timestamp = {2014-07-19T20:35:42.000+0200}, title = {Within- and between-day stability of treadmill walking VO2 in children with hemiplegic cerebral palsy, stability of walking VO2 in children with CP.}, url = {http://dx.doi.org/10.1016/j.gaitpost.2004.01.004}, username = {ar0berts}, volume = 21, year = 2005 }