Autism severity and muscle strength: A correlation analysis

Janet K. Kern, David A. Geier, James Adams, Melissa R. Troutman, Georgia Davis, Paul G. King, John L. Young, Mark R. Geier

Research output: Contribution to journalArticlepeer-review

26 Scopus citations


The current study examined the relationship between muscle strength, as measured by hand grip strength, and autism severity, as measured by the Childhood Autism Rating Scale (CARS). Thirty-seven (37) children with a diagnosis of autism spectrum disorder (ASD) were evaluated using the CARS and then tested for hand muscle strength using a hand grip dynamometer. Statistical analysis was then conducted to examine the relationship between autism severity and hand muscle strength. The model generated in the present study showed that the CARS score is a significant predictor of Max Hand Muscle Score after adjustment for age, race, gender, year of birth, and a history of prior chelation therapy. Evidence suggests that hand grip strength in children with ASD is related to the severity of the disorder. Further research is needed to determine the extent and consistency of the muscle weakness and possible treatments.

Original languageEnglish (US)
Pages (from-to)1011-1015
Number of pages5
JournalResearch in Autism Spectrum Disorders
Issue number3
StatePublished - Jul 2011


  • Autism
  • Autism severity
  • Grip strength
  • Muscle strength

ASJC Scopus subject areas

  • Developmental and Educational Psychology
  • Clinical Psychology
  • Psychiatry and Mental health


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