Isaacs L D
Department of Biological Sciences, Exercise Science/Pre-physical Therapy, Wright State University, Dayton, OH 45435-0001, USA.
Percept Mot Skills. 1998 Apr;86(2):659-63. doi: 10.2466/pms.1998.86.2.659.
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.
