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Analyzing Sports Skills

Analyzing Sports Skills. Qualitative vs Quantitative Qualitative Visual observation Quantitative Physical measurements of time, force, etc. Can be an expensive process!. Analyzing Sports Skills. McGinnis process Description Develop a theoretical model of performance Observation

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Analyzing Sports Skills

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  1. Analyzing Sports Skills • Qualitative vs Quantitative • Qualitative • Visual observation • Quantitative • Physical measurements of time, force, etc. • Can be an expensive process!

  2. Analyzing Sports Skills • McGinnis process • Description • Develop a theoretical model of performance • Observation • Watch technique of individual • Evaluation • Compare ideal technique to the observed performance • Instruction • Provide feedback and instruction

  3. Analyzing Sport Skills • Determine the Objectives of the Skill • Special Characteristics of the Skill • Study Top-Flight Performances of the Skill • Divide the Skill Into Phases • Preparatory Movements and Mental Set • Wind-up (Backswing, etc.) • Force-Producing Movements • Follow-Through (Recovery) • Divide Each Phase Into Key Elements • Understand the Mechanical Reasons

  4. Identifying and Correcting Errors • Observe the Complete Skill • Determine optimal viewing points • Safety concerns for coach and athlete during viewing • Uninterrupted execution of the skill • Analyze Each Phase and its Key Elements • Backward approach • Knowledge of Biomechanics and Physiology • Select the Errors • Methods to correct the Errors

  5. Example Analysis • Sprint Running (pg 308) • Cyclic skill • Stride length + Stride frequency • Race components • Start • Acceleration phase • Velocity maintenance phase • Finish

  6. Step #1: Theoretical Basis • Develop theoretical basis • Purpose of running the 100 meter dash • Performance criterion would be 100 meter dash time • Develop performance criterion for each phase • Start components and time factor • Acceleration phase components and time factor • Velocity maintenance components • Finish components Average Velocity = Step length x Stride frequency

  7. What makes a sprinter fast? • Horizontal displacement affects horizontal velocity • Force applied to the ground during support phase is related to the friction force between the runner’s shoe and the ground • Negative work component (Eccentric loading) • Support phase • Positive work component (Concentric contractions) • Propulsive phase • Speeds up the runner

  8. What makes a sprinter fast? • Flight time is affected by vertical velocity • CG height at takeoff • CG height upon landing • Average drag force due to air resistance • Figure 13.14 (pg 311)

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