Lower limb extension is improved in fast walking condition in children who walk in crouch gait

References

• Nelson KB. The epidemiology of cerebral palsy in term infants. Ment Retard Dev Disabil Res Rev. 2002;8:146–150.
   PubMedGoogle Scholar
• Winter S, Autry A, Boyle C, et al. Trends in the prevalence of cerebral palsy in a population-based study. Pediatrics. 2002;110:1220–1225.
   PubMed Web of Science ®Google Scholar
• Bax M, Goldstein M, Rosenbaum P, et al. Proposed definition and classification of cerebral palsy. Dev Med Child Neurol. 2005;47:571–576.
   PubMed Web of Science ®Google Scholar
• Gage JR, Schwartz MH, Koop SE, et al. The identification and treatment of gait problems in cerebral palsy. London (UK): Wiley; 2009.
   Google Scholar
• Himmelmann K, Hagberg G, Uvebrant P. The changing panorama of cerebral palsy in Sweden. X. Prevalence and origin in the birth-year period 1999-2002. Acta Paediatr. 2010;99:1337–1343.
   PubMed Web of Science ®Google Scholar
• Abel MF, Damiano DL. Strategies for increasing walking speed in diplegic cerebral palsy. J Pediatr Orthop. 1996;16:753–758.
   PubMed Web of Science ®Google Scholar
• Wren TAL, Rethlefsen S, Kay RM. Prevalence of specific gait abnormalities in children with cerebral palsy: influence of cerebral palsy subtype, age, and previous surgery. J Pediatr Orthop. 2005;25:79–83.
   PubMed Web of Science ®Google Scholar
• Agarwal-Harding KJ, Schwartz MH, Delp SL. Variation of hamstrings lengths and velocities with walking speed. J Biomech. 2010;43:1522–1526.
   PubMed Web of Science ®Google Scholar
• Sutherland DH, Davids JR. Common gait abnormalities of the knee in cerebral palsy. Clin Orthop. 1993;288:139–147.
   PubMed Web of Science ®Google Scholar
• Nieuwenhuys A, Õunpuu S, Van Campenhout A, et al. Identification of joint patterns during gait in children with cerebral palsy: a Delphi consensus study. Dev Med Child Neurol. 2016;58:306–313.
   PubMed Web of Science ®Google Scholar
• Rodda JM, Graham HK, Carson L, et al. Sagittal gait patterns in spastic diplegia. J Bone Joint Surg Br. 2004;86:251–258.
   PubMedGoogle Scholar
• Gormley ME. Treatment of neuromuscular and musculoskeletal problems in cerebral palsy. Pediatr Rehabil. 2001;4:5–16.
   PubMedGoogle Scholar
• Kim CJ, Son SM. Comparison of spatiotemporal gait parameters between children with normal development and children with diplegic cerebral palsy. J Phys Ther Sci. 2014;26:1317–1319.
   PubMedGoogle Scholar
• Pirpiris M, Gates PE, McCarthy JJ, et al. Function and well-being in ambulatory children with cerebral palsy. J Pediatr Orthop. 2006;26:119–124.
   PubMed Web of Science ®Google Scholar
• Duffy CM, Hill AE, Cosgrove AP, et al. Energy consumption in children with spina bifida and cerebral palsy: a comparative study. Dev Med Child Neurol. 1996;38:238–243.
   PubMed Web of Science ®Google Scholar
• LaPlante J, Kaeser TP. A history of pedestrian signal walking speed assumptions. Paper presented at 3rd Urban Street Symposium: Uptown, Downtown, or Small Town: Designing Urban Streets That Work; 2007 June 24–27; Seattle (WA). Available from: https://trid.trb.org/view.aspx?id=850977
   Google Scholar
• Pirpiris M, Wilkinson AJ, Rodda J, et al. Walking speed in children and young adults with neuromuscular disease: comparison between two assessment methods. J Pediatr Orthop. 2003;23:302–307.
   PubMed Web of Science ®Google Scholar
• Schwartz MH, Rozumalski A, Trost JP. The effect of walking speed on the gait of typically developing children. J Biomech. 2008;41:1639–1650.
   PubMed Web of Science ®Google Scholar
• Stansfield BW, Hillman SJ, Hazlewood ME, et al. Sagittal joint kinematics, moments, and powers are predominantly characterized by speed of progression, not age, in normal children. J Pediatr Orthop. 2001;21:403–411.
   PubMed Web of Science ®Google Scholar
• Wheelwright EF, Minns RA, Law HT, et al. Temporal and spatial parameters of gait in children. I: Normal control data. Dev Med Child Neurol. 1993;35:102–113.
   PubMed Web of Science ®Google Scholar
• Steele KM, Demers MS, Schwartz MH, et al. Compressive tibiofemoral force during crouch gait. Gait Posture. 2012;35:556–560.
   PubMed Web of Science ®Google Scholar
• Davis RB III, Õunpuu S, Tyburski D, et al. A gait analysis data collection and reduction technique. Hum Mov Sci. 1991;10:575–587.
   Web of Science ®Google Scholar
• Woltring HJ. A Fortran package for generalized, cross-validatory spline smoothing and differentiation. Adv Eng Softw 1978. 1986;8:104–113.
   Web of Science ®Google Scholar
• Della Croce U, Riley PO, Lelas JL, et al. A refined view of the determinants of gait. Gait Posture. 2001;14:79–84.
   PubMed Web of Science ®Google Scholar
• Davids JR, Cung NQ, Chen S, et al. Control of walking speed in children with cerebral palsy. J Pediatr Orthop. 2017. DOI:10.1097/BPO.0000000000000978
   Google Scholar
• Linden ML, van der Hazlewood ME, Hillman SJ, et al. Passive and dynamic rotation of the lower limbs in children with diplegic cerebral palsy. Dev Med Child Neurol. 2006;48:176–180.
   PubMed Web of Science ®Google Scholar
• McNee AE, Shortland AP, Eve LC, et al. Lower limb extensor moments in children with spastic diplegic cerebral palsy. Gait Posture. 2004;20:171–176.
   PubMed Web of Science ®Google Scholar
• van der Krogt MM, Doorenbosch CAM, Harlaar J. The effect of walking speed on hamstrings length and lengthening velocity in children with spastic cerebral palsy. Gait Posture. 2009;29:640–644.
   PubMed Web of Science ®Google Scholar
• Cohen J. Statistical power analysis. Curr Dir Psychol Sci. 1992;1:98–101.
   Google Scholar
• Bonnefoy-Mazure A, Sagawa Y, Lascombes P, et al. Identification of gait patterns in individuals with cerebral palsy using multiple correspondence analysis. Res Dev Disabil. 2013;34:2684–2693.
   PubMed Web of Science ®Google Scholar
• Ballaz L, Plamondon S, Lemay M. Ankle range of motion is key to gait efficiency in adolescents with cerebral palsy. Clin Biomech (Bristol, Avon). 2010;25:944–948.
   PubMed Web of Science ®Google Scholar
• Gage JR. The clinical use of kinetics for evaluation of pathologic gait in cerebral palsy. Instr Course Lect. 1995;44:507–515.
   PubMedGoogle Scholar
• Gage JR, Novacheck TF. An update on the treatment of gait problems in cerebral palsy. J Pediatr Orthop B. 2001;10:265–274.
   PubMed Web of Science ®Google Scholar
• Sangeux M, Rodda J, Graham HK. Sagittal gait patterns in cerebral palsy: the plantarflexor-knee extension couple index. Gait Posture. 2015;41:586–591.
   PubMed Web of Science ®Google Scholar
• O'Sullivan R, Walsh M, Kiernan D, et al. The knee kinematic pattern associated with disruption of the knee extensor mechanism in ambulant patients with diplegic cerebral palsy. Clin Anat. 2010;23:586–592.
   PubMed Web of Science ®Google Scholar
• Hak L, Houdijk H, Beek PJ, et al. Steps to take to enhance gait stability: the effect of stride frequency, stride length, and walking speed on local dynamic stability and margins of stability. PLoS One. 2013;8:e82842.
   PubMed Web of Science ®Google Scholar
• Orendurff MS, Segal AD, Klute GK, et al. The effect of walking speed on center of mass displacement. J Rehabil Res Dev. 2004;41:829–834.
   PubMed Web of Science ®Google Scholar
• Hak L, Houdijk H, Steenbrink F, et al. Speeding up or slowing down?: Gait adaptations to preserve gait stability in response to balance perturbations. Gait Posture. 2012;36:260–264.
   PubMed Web of Science ®Google Scholar
• Arvin M, Mazaheri M, Hoozemans MJM, et al. Effects of narrow base gait on mediolateral balance control in young and older adults. J Biomech. 2016;49:1264–1267.
   PubMed Web of Science ®Google Scholar
• Rugelj D, Tomšič M, Sevšek F. Do fallers and nonfallers equally benefit from balance specific exercise program? A pilot study. BioMed Res Int. 2013;2013:753298.
   PubMedGoogle Scholar