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Effect of Depth Jumps on Agility in Female Varsity Hockey Players. By: Sadie Whaley Advisor: Jeff Vossen Co-Advisor: Angie Kolen October 30 th , 2013. Agenda. Introduction Literature Review Purpose Methods Procedure Tests. Introduction. - PowerPoint PPT Presentation
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Effect of Depth Jumps on Agilityin Female Varsity Hockey Players
By: Sadie WhaleyAdvisor: Jeff Vossen
Co-Advisor: Angie KolenOctober 30th , 2013
AgendaIntroductionLiterature
ReviewPurposeMethodsProcedureTests
IntroductionPlyometrics are exercises used to increase power in
athletes (Fatourors, 2000)Power – amount of work a muscle can produce per unit
of time (Adams, O’Shea, O’Shea & Climstein, 1992)Plyometric exercises are characterized by a rapid
lengthening of the muscle followed immediately by a shortening muscle action (Miller, Herniman, Ricard, Cheatham & Michael, 2006)
Depth Jumps are continually used in plyometric studies (Flanagan, Ebben & Jensen, 2008)
Elite hockey training often uses plyometrics for strength and increasing speed (Ebben, Carroll & Simenz, 2004)
Agility and HockeyDuring hockey games, players are continually stopping,
starting and changing directionAgility – ability to maintain and control correct body
position while quickly changing direction through a series of movements (Yap & Brown, 2000)
Important skill in hockey – NHL Strength & Conditioning Coaches use this in training and testing (Ebben, Carroll & Simenz, 2004)
Power gained through plyometrics could improve agility as changing direction in an explosive manner requires a high force output (Asadi, 2012)
If plyometrics are already used to train to increase power, do they have an affect on any other skills?
Literature Review Authors Subjects Training
Protocol Analysis Conclusion
Thomas, French & Hayes, 2009
12 soccer players (Age = 17.3 +/- 0.4)
6 week depth jump and counter movement jump training
Mixed-factorial ANOVA
Significant increases (p<0.05) in both vertical jump (F[1,10] = 42.22) and agility (F[1,10] = 60.97)
Miller, Herniman, Ricard, Cheatham & Micheal , 2006
28 volunteers split into control and training group ( Age = 24.2 +/- 4.8)
6 weeks (2 times per week) various plyometric exercises
Single factor ANCOVAs were used
Significant increases in T-Test times, 4.86 %; Illinois Agility Test – 2.93 % and Vertical max – 10% (p<0.05)
Asadi, 2012 16 male college students split into DJ or CMJ training group
6 weeks (2 times per week) Depth Jump and counter movement jump
2 X 2 Analysis of variance were used
Significant increases in both Illinois Agility test and T-test scores for both groups (p<0.05)
PurposeThe main objective of this study is to
determine if a depth jump training program increase’s individuals agility and vertical jump
Hypothesis
I hypothesize that a depth jump training program will increase the subjects agility and
vertical jump height.
Subjects10 – 15 Female St. FX
Varsity Hockey athletes
No prior plyometric training required
No initiation of new lower body training regimen
Participation is voluntary and based on recruitment through Head Coach, David Synishin
MethodologyPre-tests will be performed following
Research Ethics Board approval and completion of Consent forms by participants
Training program will be initiated in second semester
Post-tests will be performed within a week of completion of the training program to ensure benefits are still present
Training Session Protocol6 weeks of training with 2 sessions per week
Warm up: 5 minutes on stationary bikeDynamic stretches
Training: Depth Jump Intensity basedon week protocol (See next slide)
Cool Down: 2 minutes on stationary bike followed by static stretches
Training Portion
• Entire training portion consists of depth jump
• 15 second rest between repetitions
• 3 minute rest between sets
(Read & Cisar, 2001)
Week Sets Repetitions
1 2 8 2 3 10 3 3 10 4 3 10 5 3 10 6 3 10
Week 1: Focus is familiarization (Gehri et al, 1998)Week 2-6: Focus on proper technique and power production
Depth Jump
Subjects will be instructed to step off a 40 cm box, land and perform a maximal vertical jump while
minimizing contact time.(Thomas, French & Hayes, 2009)
Testing Warm-up prior to testing
5 minute stationary cyclingDynamic Stretches
2 Practice trials for each test then record
Illinois Agility TestT-TestJump Height Test
Cool-down post testingStationary BikeStatic stetching
Illinois Agility TestDimensions will be measured using open reel long dimension tape measure
Light sensor stop-watches at start and finish gate to ensure accuracy
Observer at far line to ensure subjects reach the end
Considered standard test in agility (Sheppard & Young, 2006)
T-Test
(Miller, Herniam, Ricard, Cheatham & Michael, 2006)
Dimensions measured using open reel tape measure
Laser stop watch at start and finish to ensure accuracy
Vertical JumpComplete vertical jump on force plate Force plate measures impulse which can be
used to calculate vertical jump heightForce plate – PasPort 2-Axis Force Platform Model No, PS-2142Data imported to Microsoft excel
Statistical Analysis 2 X 3 Analysis of Variance (ANOVA) with
Repeated Measures using SPSS Version 15.0.1
Dependent Variables: -Pre-test - Post-test
Independent Variables: - Illinois Agility Test- T-Test- Vertical Max
Acknowledgements
Jeff VossenAngie KolenGraham Kennedy St FX Human Kinetics
Department
Questions