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Movement Analysis of the Back handspring.


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Movement Analysis of the Back handspring. December 8, 2005. Catie O’Reilly Kurstin Meenan Andrea Maillett Bob Kniffen Lisa Stuart. Background and Goals. Gymnastics Introduced to the United States in 1830’s First large scale competition was held in 1896 in Athens, Greece
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Development Analysis of the Back handspring December 8, 2005 Catie O'Reilly Kurstin Meenan Andrea Maillett Bob Kniffen Lisa Stuart

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Background and Goals Gymnastics Introduced to the United States in 1830's First huge scale rivalry was held in 1896 in Athens, Greece There are numerous levels of acrobatic movement including recreational, non-tip top focused (levels 1-7), abnormal state aggressive (levels 8-10) and tip top. The Back handspring Part of movement to more troublesome aptitudes Performed various times in preparing and rivalry From a stand, a regressive bounce in an angled position to the hands (going through a handstand) trailed by a brisk snap-down of the legs, completing in a standing position Goals Perform expertise in controlled and agile way Perform aptitude as per benchmarks set by the game of vaulting (body arrangement and so forth)

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Phase 1 – "sit and swing" Most essential part of the back handspring Stand with arms above head Bend at hip and knee joints to drop bum down and back (movements the focal point of gravity) Knees ought not twist past 90 o While bowing, arms swing down and after that up overhead in a nonstop movement Lean in reverse and push commandingly with legs – anticipating the athlete upwards and in reverse

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"Sit" Muscle Eccentric Quadriceps Hamstrings Gastrocnemius Gluteus Maximus Concentric Rear deltoids Stabilization Abdominal muscles Joint Movements Flexion of hips, knees, lower legs Extension of shoulders "Swing" Muscles Concentric Quadriceps Hamstrings Gastrocnemius Anterior Deltoids Gluteus Maximus Trapezius Joint Movements Extension of hips, knees, lower legs, back Shoulder flexion Muscles and Joints of Phase 1

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Phase 2 – going through the handstand position Arch back and go after the floor Body is still tight Hands touch floor Large compressive powers at wrist and hand Elbows flex marginally to ingest stun (pressure powers are a normal of 2.37 times the body weight) Angular force made in stage 1 keeps the body pivoting in reverse

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Eccentric Triceps Wrist extensors Concentric Gluteus maximus Erector spinae bunch Deltoids Trapezius Quadriceps Stabilization Biceps Abdominal muscles Vertebrae amplify Shoulders continue developing Hips, knees and lower legs stay amplified Muscles and Joints of Phase 2 Muscles Joint developments

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Phase 3 – Push off and snap down Angular energy produced amid stage 1 permits entry through handstand position Hands press on floor (push off) Helps the body keep up satisfactory precise energy to proceed with the development Flight way of the body was dictated by the speed and stature of the focal point of gravity at the season of departure (Phase 1)

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Concentric Wrist extensors Triceps Latissimus dorsi Trapezius Deltoids Levator scapula Hip Flexors Stabilization Abdominal muscles Erector spinae bunch Extension Wrists Elbows Flexion Hips Muscles and Joints of Phase 3 Muscles Joint developments

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Phase 4 –Landing Feet touch floor, head and middle come up Joint flexion Hip (32 o ), knee (22.4 o ), lower leg (- 0.5 o ) Eccentric powers amid landing give a turning impact the other way of BHS development Angular energy and direct interpretation are diminished to zero

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Eccentric Quadriceps Hamstrings Gastrocnemius Gluteals Stabilization Core muscles Flexion Hip Knee Ankle Muscles and Joints of Phase 4 Muscles Joint developments

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Center of gravity Phase 1 Phase 2 Phase 3 Phase 4 Phase 1 – Center of gravity is moved to behind the body Phase 2 – Center of gravity is tossed once again into a curve Phase 3 – Angular energy permits focal point of gravity to ignore head/hands Phase 4 – Center of gravity is come back to beginning position

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Angular Momentum Center of gravity is behind the body amid the sit and swing (Phase 1) An unstable push now creates the rakish force expected to extend the acrobat upwards and in reverse Angular energy created amid stage 1 is sufficient to permit the tumbler to go through the handstand position A push with the arms and shoulders while going through the handstand position creates somewhat more rakish energy to make the arrival sharp Angular energy is come back to zero amid the arrival (when feet hit the floor) The arrival is controlled by flexing at the knees, hips and lower legs – this backs off the body and disperses the vitality Phase 1 Phase 2 Phase 3 Phase 4

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Mass Moment of Inertia Defined as the imperviousness to change in precise velocity How this idea applies to the back handspring insufficient force created amid stage 1 of the activity Cannot finish exercise in the sought stretched out position Bend knees to decline minute arm Moment arm

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Limitations Flexibility Back, shoulder, hips Strength Ability to create enough precise force Ability to bolster bodyweight on hands Balance Ability to move beyond mental trepidation

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Specific activities Handstand With snap down Squat hops Core fortifying Pushups Bridge Shoulder extends General extending

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Common Injuries Floor activities are the most widely recognized reason for harm, because of the substantial number of twists, turns, and arrivals required in those schedules The lower leg and foot are the most well-known site of damage in both guys and females. Wounds additionally jump out at the lower back, knee and wrist/hand. Muscle pulls (strains) Stress cracks Tendonitis Lumbar spine wounds are regular in acrobatic due to the dreary hyperextension and unreasonable preparing

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Video

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Video (cont… )

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References http://www.ausport.gov.au/fulltext/2000/vic/gymnastics.asp http://www.safeusa.org/sports/gymnasti.htm http://www.medscape.com/viewarticle/408524_5 http://www.coachesinfo.com/classification/tumbling/65#3 Tonry, Don; Sports Illustrated Women's Gymnastic , Harper &Row, distributers, New York, 1980 Koh TJ, Grabiner MD, Weiker GG. Procedure and ground response strengths in the back handspring. American Journal of Sports Medicine . 1992 Jan-Feb;20(1):61-6. Feed, James G; The Biomechanics of Sports Techniques . Benjamin Cummings; 1993. Sands, Bill et al. Investigative Aspects of Women's Gymnastics , S. Karger Publishers, 2004

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Questions for last test of the year During stage 1 of a back handspring ("sit and swing") what starts the retrogressive turn of the body Keeping the head lifted Leaning forward Transfer of the focal point of gravity behind the body A running begin Bending your legs past 90 o  2. During stage 1 of the back handspring you develop which of the accompanying lower leg hip knee All of the above When going through the handstand position of a back handspring elbows ought to be totally straight to assimilate stun True False What's the most imperative part of a back handspring Arching the back Snapping the legs down Take off from the floor Ability to hold a handstand None of the above If an athlete doesn't have enough compel amid the departure period of a back handspring, which of the accompanying would diminish the snippet of inactivity permitting them to finish the activity Bending the elbows Bending legs Straddling legs Keeping head forward