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Discus throw Biomechanical Analysis
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- 2. Variables for Analysis •Phases of Discus Throw • Velocity curve • Gain in Velocity • Angle of Release • Height of release • Arm tilt angle • Throwing kinetics
- 3. Phases of theDiscus Throw
- 4. Optimum range ofPhases (Olympic games) • Double support > 0.6 sec • 0.45 sec < Single support < 0.55 sec • 0.08 sec < Flight < 0.12 sec • 0.17 sec < Single support in the middle < 0.22 sec • Delivery = 0.15 sec * Throwing Kinematics for Top Four Discus Performers at 1996 Atlanta Olympics
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- 6. 61% 17% 2% 7% 6% 7% Phase Analysis Double support 1st single support Jump1st 2nd single support Delivery Recovery phase 11% 17% 4% 8% 6% 54% AleknaSilcenok Phase Comparison
- 7. Velocity curve ofDiscus Throw 0 500 1000 1500 2000 2500 3000 0 20 40 60 80 100 120 140 Alekna (Velocity) * Throwing Kinematics for Top Four Discus Performers at 1996 Atlanta Olympics
- 8. Silcenok = 21m/s Alekna = 20 m/s
- 9. Arm tilt angle Silcenok= 11° Alekna = 17° Recommended arm tilt angle at release between 0 and 10 degrees (Leigh et al, 2008)
- 10. • Height ofRelease • Angle of release Silcenok = 161.95 m Alekna = 173,14 m Silcenok = 24° Alekna = 29° Range mean Correlation Height of discus at release (m) 1.1 to 1.8 1.6 ± 0.2 0.232 Angle of release 27 to 43 35 ± 6 4 0.418** (Leigh et al 2008
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- 13. Differences • Angle ofrelease • Duration of the delivery phase • Change of the discus velocity before and during delivery phase
- 14. Discussion Poor control ofthe discus in the moment of release Consequence low angle of release, Shorter the distance of the throw
- 15. Contributions to ThrowingVelocity • Translated linear velocity of CM & shoulder • Hip rotation • Spinal rotation • Horizental flexion of shoulder joint • Internal rotation of humerus • Elbow extention • Wrist and finger flexion
- 16. Refrences Leigh, Steve &T Gross, Michael & Li, Li & Yu, Bing. (2008). The relationship between discus throwing performance and combinations of selected technical parameters. Sports biomechanics / International Society of Biomechanics in Sports. 7. 173-93. 10.1080/14763140701841399. * Throwing Kinematics for Top Four Discus Performers at 1996 Atlanta Olympics