Commentary on "Stretching and Progressive Resistance Exercise in Children With Cerebral Palsy: A Randomized Controlled Trial".

palsy. Phys Ther. 2010;90(2):269-279. 23. Verschuren O, Peterson MD, Balemans AC, Hurvitz EA. Exercise and physical activity recommendations for people with cerebral palsy. Dev Med Child Neurol. 2016;58(8):798-808. 24. Scholtes VA, Dallmeijer AJ, Rameckers EA, et al. Lower limb strength training in children with cerebral palsy—a randomized controlled trial protocol for functional strength training based on progressive resistance exercise principles. BMC Pediatr. 2008;8:41. 25. Boyd RN, Graham HK. Objective measurement of clinical findings in the use of botolinium toxin type A for the management of children with cerebral palsy. Eur J Neurol. 1999;6:23-35. 26. Hamid MSA, Ali MRM, Yusof A. Interrater and intrarater reliability of the active knee extension (AKE) test among healthy adults. J Phys Ther Sci. 2013;25:957-961. 27. McDowell BC, Hewitt V, Nurse A, Weston T, Baker R. The variability of goniometric measurements in ambulatory children with spastic cerebral palsy. Gait Posture. 2000;12(2):114-121. 28. McWhirk LB, Glanzman AM. Within-session inter-rater reliability of goniometric measures in patients with spastic cerebral palsy. Pediatr Phys Ther. 2006;18(4):262-265. 29. Ten Berge SR, Halbertsma JP, Maathuis PG, Verheij NP, Dijkstra PU, Maathuis KG. Reliability of popliteal angle measurement: a study in cerebral palsy patients and healthy controls. J Pediatr Orthop. 2007; 27(6):648-652. 30. Bennett DA. How can I deal with missing data in my study? Aust N Z J Public Health. 2001;25(5):464-469. 31. Terjesen T, Lofterod B, Skaaret I. Gait improvement surgery in ambulatory children with diplegic cerebral palsy. Acta Orthop. 2015;86(4):511517. 32. Faigenbaum AD, Kraemer WJ, Blimkie CJ, et al. Youth resistance training: updated position statement paper from the national strength and conditioning association. J Strength Cond Res. 2009;23(5 suppl): S60-S79. 33. Holm I, Fredriksen P, Fosdahl M, Vollestad N. A normative sample of isotonic and isokinetic muscle strength measurements in children 7 to 12 years of age. Acta Paediatr. 2008;97(5):602607.