A comparison of mechanical parameters between the counter movement jump and drop jump in Biathletes

• Authors: Henryk Król , Władysław Mynarski
• Languages of publication: EN

Abstracts

EN

The main objective of the study was to determine to what degree higher muscular activity, achieved by increasedload in the extension phase (eccentric muscle action) of the vertical jump, affects the efficiency of the vertical jump.Sixteen elite biathletes participated in this investigation. The biathletes performed tests that consisted of five, single“maximal” vertical jumps (counter movement jump - CMJ) and five, single vertical jumps, in which the task was totouch a bar placed over the jumping biathletes (specific task counter movement jump - SCMJ). Then, they performedfive, single drop jumps from an elevation of 0.4m (DJ). Ground reaction forces were registered using the KISTLER9182C force platform. MVJ software was used for signal processing (Król, 1999) and enabling calculations forkinematic and kinetic parameters of the subject’s jump movements (on-line system). The results indicate that onlyheight of the jump (h) and mean power (Pmean) during the takeoff are statistically significant. Both h and Pmean arehigher in the DJ. The results of this study may indicate that elite biathletes are well adapted to eccentric work of thelower limbs, thus reaching greater values of power during the drop jump. These neuromuscular adaptive changes mayallow for a more dynamic and efficient running technique.

Keywords

EN

biathletes; muscular activity; drop jump; vertical jump

• Publisher: De Gruyter Open
• Journal: Journal of Human Kinetics
• Year: 2012
• Volume: 34
• Issue: 1
• Pages: 59-68

Dates

published

1 - 10 - 2012

online

23 - 10 - 2012

Contributors

author

Henryk Król

• Academy of Physical Education in Katowice, Poland, Department of Biomechanics

author

Władysław Mynarski

• Academy of Physical Education in Katowice, Poland, Department of Recreation

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Identifiers

DOI

10.2478/v10078-012-0064-y