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The Effects of Cheerleading Surfaces on Landing Characteristics During Vertical and Flip Landings.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	The Effects of Cheerleading Surfaces on Landing Characteristics During Vertical and Flip Landings./
Author:	Nguyen, Anthony.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2022,
Description:	101 p.
Notes:	Source: Masters Abstracts International, Volume: 84-05.
Contained By:	Masters Abstracts International84-05.
Subject:	Biomechanics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29328013
ISBN:	9798357531094

The Effects of Cheerleading Surfaces on Landing Characteristics During Vertical and Flip Landings.
Nguyen, Anthony.

The Effects of Cheerleading Surfaces on Landing Characteristics During Vertical and Flip Landings. - Ann Arbor : ProQuest Dissertations & Theses, 2022 - 101 p.

Source: Masters Abstracts International, Volume: 84-05.

Thesis (M.S.)--The University of Wisconsin - Milwaukee, 2022.

This item must not be sold to any third party vendors.

Lateral ankle sprains are common injuries in cheerleading and typically occurring during tumbling. The landing surface can impact injury risk by modulating loading parameters and risky joint positions. Most surface-landing studies have used vertical landing tasks to study acrobatic populations, and few studies have compared vertical and flipping tasks. Therefore, the purpose of this study was to compare the effects of two cheerleading surfaces between vertical drop landing and flip landing tasks. Doing so explained surface characteristic influences on landing and the validity of using vertical landing tasks to represent acrobatic sports. Twelve collegiate cheerleaders (7 females, 5 males; age: 21.0 ± 2.5 years; mass: 64.5 ± 14.5 kg; height: 1.7 ± 0.1 m) performed flip (FLIP) and vertical (VERT) landing tasks over a harder (HARD) and matted (MAT) surface. Three-dimensional kinematics and kinetics were collected, and sagittal and frontal plane kinematic and kinetic variables were extracted during landing. Repeated measures ANOVAs (task x surface) were conducted to determine task and surface effects (p < .05). The FLIP task caused significantly greater impact peaks and loading rates, greater knee flexion at IC, peak knee extension and abduction moments, greater ankle plantar flexion and eversion moments, and less ankle plantar flexion at IC. There was greater vertical foot velocity at IC during FLIP tasks which was primarily due to angular velocity, and it likely explains the greater loading characteristics during FLIP tasks. The HARD surface landing caused significantly greater loading rates, greater knee flexion and ankle inversion at IC. Sagittal ankle moments had a significant task and surface interaction (p = .006), but no joint moment surface effects were observed. These indicated that FLIP and VERT tasks are significantly different due to angular components. The larger forces and joint stress observed in flipping places individuals at greater risk for ankle injuries. Flipping on a harder surface also introduced higher risks. The theory that landing on harder surfaces increases injury risk is supported. These results also caution individuals when generalizing vertical landings to acrobatic populations.

ISBN: 9798357531094Subjects--Topical Terms:

565307
Biomechanics.
Subjects--Index Terms:

Cheerleading

The Effects of Cheerleading Surfaces on Landing Characteristics During Vertical and Flip Landings.
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500 $a Source: Masters Abstracts International, Volume: 84-05.
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520 $a Lateral ankle sprains are common injuries in cheerleading and typically occurring during tumbling. The landing surface can impact injury risk by modulating loading parameters and risky joint positions. Most surface-landing studies have used vertical landing tasks to study acrobatic populations, and few studies have compared vertical and flipping tasks. Therefore, the purpose of this study was to compare the effects of two cheerleading surfaces between vertical drop landing and flip landing tasks. Doing so explained surface characteristic influences on landing and the validity of using vertical landing tasks to represent acrobatic sports. Twelve collegiate cheerleaders (7 females, 5 males; age: 21.0 ± 2.5 years; mass: 64.5 ± 14.5 kg; height: 1.7 ± 0.1 m) performed flip (FLIP) and vertical (VERT) landing tasks over a harder (HARD) and matted (MAT) surface. Three-dimensional kinematics and kinetics were collected, and sagittal and frontal plane kinematic and kinetic variables were extracted during landing. Repeated measures ANOVAs (task x surface) were conducted to determine task and surface effects (p < .05). The FLIP task caused significantly greater impact peaks and loading rates, greater knee flexion at IC, peak knee extension and abduction moments, greater ankle plantar flexion and eversion moments, and less ankle plantar flexion at IC. There was greater vertical foot velocity at IC during FLIP tasks which was primarily due to angular velocity, and it likely explains the greater loading characteristics during FLIP tasks. The HARD surface landing caused significantly greater loading rates, greater knee flexion and ankle inversion at IC. Sagittal ankle moments had a significant task and surface interaction (p = .006), but no joint moment surface effects were observed. These indicated that FLIP and VERT tasks are significantly different due to angular components. The larger forces and joint stress observed in flipping places individuals at greater risk for ankle injuries. Flipping on a harder surface also introduced higher risks. The theory that landing on harder surfaces increases injury risk is supported. These results also caution individuals when generalizing vertical landings to acrobatic populations.
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650 4 $a Kinesiology. $3 721210
650 4 $a Physical education. $3 1179721
653 $a Cheerleading
653 $a Flip
653 $a Landing
653 $a Mechanics
653 $a Surface
653 $a Vertical
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710 2 $a The University of Wisconsin - Milwaukee. $b Kinesiology. $3 1413587
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791 $a M.S.
792 $a 2022
793 $a English
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