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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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COMPARING THE EFFECTS OF VARIOUS WHOLE-BODY VIBRATION ACCELERATIONS ON COUNTER-MOVEMENT JUMP PERFORMANCE |
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David M. Bazett-Jones  ,
Holmes W. Finch and Eric L. Dugan |
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Biomechanics Laboratory, Ball State University, Muncie, IN, USA. |
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© Journal of Sports Science and Medicine (2008) 7, 144 - 150 Search Google Scholar for Citing Articles |
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| ABSTRACT | |||
| While it seems that whole body vibration (WBV) might be an effective
modality to enhance physical performance, the proper prescription of WBV
for performance enhancement remains unknown. The purpose of this study was
to compare the immediate effect of various WBV accelerations on counter
movement jump (CMJ) height, the duration of any effect, and differences
between men and women. Forty-four participants (33 men, 11 women) participated
in no less than four CMJ familiarization sessions and completed all vibration
sessions. Participants performed a pre-test (three maximal CMJs), followed
randomly by one of five WBV accelerations; 1g (no-WBV control), 2.16g, 2.80g,
4.87g, and 5.83g. Participants performed three maximal CMJs immediately,
five, and 10 minutes following each 45 sec WBV session. The mean of the
three performances was used and calculated as a percentage of the pre-vibration
mean value. A Repeated Measures Analysis of Variance (ANOVA; acceleration
x time x gender) model was used to analyze the data. The two-way interactions
of acceleration-gender (p = 0.033) and time-gender (p = 0.050) were significant.
Women performed significantly better following the 2.80g (p = 0.0064) and
5.83g (p = 0. 0125) WBV sessions compared to the 1g (control) session. Men,
however, did not experience performance enhancing effects following any
of the vibration sessions. While significant differences did not occur between
time in either gender, the effects of the 45 sec WBV session in women were
transient, lasting approximately five minutes. During the prescription of
WBV, gender should be considered given that the results of this study seem
to indicate that men and women respond differently to WBV. The results of
this study suggest that WBV might be a useful modality as applied during
the pre-competition warm-up.
Key words: Vertical jump, frequency, amplitude, gender. |
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