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Lara Besselt

on 29 November 2012

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Transcript of Biomechanics

Bibliograghy http://www.jssm.org/vol6/n2/1/v6n2-1pdf.pdf

http://www.livestrong.com/article/398888-training-for-soccer-skills/ Phases: Proper movement Phase 1-preliminary movement

Angel: 170.6 preliminary movement- stand up straight, feet shoulder width apart

back-swing movements- the approach, plant foot force

force producing movements- swing limb loading, hip flexion/knee extension
-The hip is also adducted and externally rotated

critical instant- leg and knee & foot contact with soccer ball

follow through movement- follow through kick
-leg crosses over the body Relation to Principles 1 & 2 Principle 2- your soccer kick provides power and taking control of the ball requires your whole body to produce maximum force
-main muscles being used to produce max force are quadriceps, abdominals, hamstrings, and glutes

Principle 1- dynamic stability while moving is important to complete the kick accurately
-when you kick the ball your core/abdominal muscles are used to help stabilize your truck during the approach, critical instant, and the follow-through
- a stable core of abdominal muscles are important to maintain dynamic stability and provide support; the muscles that the core includes is your transverse abdominis, internal oblique, paraspinal muscles, & the pelvic floor muscles
- when you approach a soccer ball for a kick, your muscles counteract and they produce a force that increases the pressure in your abdomen
-the pressure in your abdomen stabilizes your spine; thus making it easier to divulge maximum force into the ball. Comparison of rookie & professional -phase 1: the professional's leg in the preliminary movement was at an 180 degree angle whereas the rookie's leg wasn't as straight

-phase 2: Rookies planter foot too high

-phase 3:the professionals leg was at a 90 degree angle allowing more power into the kick whereas the rookie's leg wasn't as far back therefore not as much power was exerted

-phase 4: the professional had more force on the ball by having a greater angle when coming back from the back swing

-phase 5: the professional had close to a straight leg when following through with the kick whereas the rookie had more of a bent leg also allowing less power in the kick Newtons Law of Physics & Motion 1. Law of Inertia- resistance of change; the soccer ball stays stationary until the foot hits it and it keeps moving with the same force and direction

Type of motion: Linear/translational motion
-movement in a particular direction with force generated by the athletes muscles resulting motion is in a straight line Bio mechanical Principles
of a Soccer Goal Kick Professional Soccer Kick : George Cummins http://www.sportsinjurybulletin.com/archive/biomechanics-soccer.htm


http://www.sportsinjurybulletin.com/archive/biomechanics-soccer.htm 5 Phases: Angles Phase 1
-preliminary movement

Angle=180° Phase 5
-follow through

Angle=155° Phase 3
-back swing /force-producing movement

angle- 90 degrees Phase 4
-critical instant

Angle=145° Phase 2
-back swing movement

Angle=160° Professional Rookie Mistakes Rookie Phase 2: Back swing movement Angle: 164.8 Phase 3: -back swing
& force producing movement Angle: 140.9 Phase 4: critical instant Angle: 131.7 Phase 5: follow through Angle: 133.5 Rookie Video Shelby Center of Mass x= 6.8544 y= 8.267 Measuring Human movement -Coordinates in cm Kicking accuracy & factors -how fast the athlete approaches the ball & a faster in-step approach

- kicks aimed towards a set
target have more air time & little ankle displacement and velocity, compared to
kicks aimed
at an undefined target.

-the target helps determine restraint on accuracy; its
manipulation makes trade-off between the speed & accuracy

- length, speed and angle
of approach are the most important aspects of preparatory
movement for kick success
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