title: Comparison of the vertec and Just Jump Systems for measuring height of vertical jump by young children.
abstract: To assess differences between the Vertec and the Just Jump Systems in measuring height of vertical jump, 248 boys and 232 girls between 7 and 11 years were required to perform four maximal countermovement vertical jumps. A maximum of the four trials recorded was the dependent variable. Each vertical jump was simultaneously evaluated by each measuring device and a paired t test indicated the systems were significantly different; however, the experiment wise difference of .93 in has no practical value. The Just Jump System seems a viable alternative. Advantages and potential pitfalls regarding the use of each system are discussed.
authors.affiliation: Department of Biological Sciences, Exercise Science/Pre-physical Therapy, Wright State University, Dayton, OH 45435-0001, USA. lisaacs@wright.edu
authors.forename: L D
authors.initials: LD
authors.lastname: Isaacs
mesh_terms: D000367:Age Factors; D002648:Child; D002657:Child Development / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D009048:Motor Skills / Q000502:physiology*; D009068:Movement / Q000502:physiology*; D010808:Physical Examination / Q000295:instrumentation*; D010809:Physical Fitness / Q000502:physiology; D013177:Sports