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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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THE INFLUENCE OF MUSICAL CADENCE INTO AQUATIC JUMPING JACKS KINEMATICS |
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Mário J. Costa1,4  ,
Cristiana Oliveira4, Genoveva Teixeira4, Daniel A
Marinho3,4, António J. Silva2,4 and Tiago M Barbosa1,4 |
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1Department of Sport Sciences, Polytechnic Institute of Bragança, Bragança, Portugal, 2Department of Sport Sciences, Exercise and Health, University of Trás-os-Montes and Alto Douro, Vila Real, Portugal, 3Department of Sport Sciences, University of Beira Interior, Covilhã, Portugal, 4Research Centre in Sports Science, Health and Human Development, Vila Real, Portugal |
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© Journal of Sports Science and Medicine (2011) 10, 607 - 615 |
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| ABSTRACT | |||
| The aim of this study was to analyze the relationships between
the head-out aquatic exercise "Jumping jacks" kinematics and the
musical cadence in healthy and fit subjects. Five young women, with at least
one year of experience conducting head- out aquatic programs were videotaped
in the frontal plane, with a pair of cameras providing a double projection
(above and below the water surface). Subjects performed an incremental protocol
of five bouts (120 b·min-1, 135 b·min-1, 150 b·min-1,
165 b·min-1 and 180 b·min-1) with 16 full cycles
of the "Jumping jacks" exercise. Data processing and calculation
of upper limbs' (i.e. hands), lower limbs' (i.e. feet) and center of mass'
2D linear velocity and displacement were computed with the software Ariel
Performance Analysis System and applying the 2D-DLT algorithm. Subjects
decreased the cycle period during the incremental protocol. Significant
and negative relationships with the musical cadence were verified for the
center of mass and upper limbs vertical displacement. On the other hand,
for the lower limbs lateral velocity, a significant and positive relationship
was observed. It is concluded that expert and fit subjects increase the
lower limb's velocity to maintain the range of motion, while the upper limb's
displacement is reduced to coupe the music cadence. Key words: Aquatic jumping exercises, simultaneously actions, music rhythm, range of motion, segmental velocity. |
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