title: Balance and muscle power of children with Charcot-Marie-Tooth.
abstract: BACKGROUND
  In certain diseases, functional constraints establish a greater relationship with muscle power than muscle strength. However, in hereditary peripheral polyneuropathies, no such relationship was found in the literature.
  
  
  OBJECTIVE
  In children with Charcot-Marie-Tooth (CMT), to identify the impact of muscle strength and range of movement on the static/dynamic balance and standing long jump based on quantitative and functional variables.
  
  
  METHODS
  The study analyzed 19 participants aged between 6 and 16 years, of both genders and with clinical diagnoses of CMT of different subtypes. Anthropometric data, muscle strength of the lower limbs (hand-held dynamometer), ankle and knee range of movement, balance (Pediatric Balance Scale) and standing long jump distance were obtained by standardized procedures. For the statistical analysis, Pearson and Spearman correlation coefficients were used.
  
  
  RESULTS
  There was a strong positive correlation between balance and the muscle strength of the right plantar flexors (r=0.61) and dorsiflexors (r=0.59) and a moderate correlation between balance and the muscle strength of inversion (r=0.41) and eversion of the right foot (r=0.44). For the long jump and range of movement, there was a weak positive correlation with right and left plantar flexion (r=0.20 and r=0.12, respectively) and left popliteal angle (r=0.25), and a poor negative correlation with left dorsiflexion (r=-0.15).
  
  
  CONCLUSIONS
  The data on the patients analyzed suggests that the maintenance of distal muscle strength favors performance during balance tasks, while limitations in the range of movement of the legs seem not to be enough to influence the performance of the horizontal long jump.
authors: Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brasil.
authors: Tais R
authors: TR
authors: Silva
authors: Faculdade de Medicina de Ribeirão Preto (FMRP), Universidade de São Paulo (USP), Ribeirão Preto, SP, Brasil.
authors: Amanda
authors: A
authors: Testa
authors: Departamento de Biomecânica, Medicina e Reabilitação do Aparelho Locomotor, FMRP, USP, Ribeirão Preto, SP, Brasil.
authors: Cyntia R J A
authors: CR
authors: Baptista
authors: Departamento de Neurociências e Ciências do Comportamento, FMRP, USP, Ribeirão Preto, SP, Brasil.
authors: Wilson
authors: W
authors: Marques
authors: Departamento de Biomecânica, Medicina e Reabilitação do Aparelho Locomotor, FMRP, USP, Ribeirão Preto, SP, Brasil.
authors: Ana C
authors: AC
authors: Mattiello-Sverzut
mesh_terms: D000293:Adolescent; D002607:Charcot-Marie-Tooth Disease / Q000503:physiopathology*; D002648:Child; D005260:Female; D006801:Humans; D035002:Lower Extremity / Q000503:physiopathology*; D008297:Male; D053580:Muscle Strength; D004856:Postural Balance; D016059:Range of Motion, Articular