Countermovement jumps, as a speed-strength assessment, have been demonstrated to be a reliable method that has a strong association with several sport performance measures (e.g. linear sprint performance, lower body strength and power) as well as with improvements in performance with training and exercise induced fatigue. As such, the validity of countermovement jump tests as an assessment of lower- body speed-strength is well established (Tanner & Gore, 2013).
This kind of jump involves a countermovement prior to the propulsive phase and thus provides a means to assess speed-strength inclusive of the stretch shortening cycle. Athletes should be encouraged to perform a countermovement to a depth that will elicit the greatest jump height. With elite populations, this approach seems to produce more consistent and superior results compared with methods whereby the countermovement depth is dictated to the athlete (Tanner & Gore, 2013).
The countermovement jump test can performed on either a contact or a force platform while using the flight time for calculating the jump height. To increase the reliability of the test procedure athletes should complete two or more attempts with a short rest between jumps. For further analysis, using either the best or the average performance over a series of jumps may have a similar ability to monitor changes in jump performance (Haddad, Simpson & Buchheit, 2015).
To further enhance test reliability, jumps should performed with hands placed on hips. To increase validity of the countermovement jump test athletes should perform the test with arm swing.
For further information and test norms visit http://www.topendsports.com.
Countermovement Jump Test On A Contact Platform | |
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| Sports | Upload TimePublished on 27 Jul 2015 |
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