1 / 24

Variable Resistance – Implication for Swimming Training

Variable Resistance – Implication for Swimming Training. Type of Muscle Contraction Static Dynamic Angle of Pull – Invention of Isokinetic machine Swimming – Training for optimum muscle power and strength improvement. By Jackson Pui Man Wai, Ph.D. First-Class lever. 第一型槓桿.

jeske
Download Presentation

Variable Resistance – Implication for Swimming Training

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Variable Resistance – Implication for Swimming Training Type of Muscle Contraction Static Dynamic Angle of Pull – Invention of Isokinetic machine Swimming – Training for optimum muscle power and strength improvement By Jackson Pui Man Wai, Ph.D.

  2. First-Class lever 第一型槓桿

  3. Second-Class lever 第二型槓桿

  4. Third-Class lever 第三型槓桿

  5. 40 kg x 1 m = 40 kgm 20 kg x 2 m = 40 kgm (20+5) kg x 1.6 m = 40 kgm

  6. Muscle Angle of Pull - Tension Relationship Source: Fox, Bower, and Foss. The Physiological Basis of Physical Education and Athletics.

  7. Muscle Angle of Pull - Tension Relationship Source: Fox, Bower, and Foss. The Physiological Basis of Physical Education and Athletics.

  8. LW LF LF LF LW LW Effect of Angle of Pull on Muscle tension Experimental setting

  9. LF LF LF LW LW LW Effect of Angle of Pull on Muscle tension Realistic setting

  10. Open System F = ma  a = F/m  a  F, Thus  F  a Energy of muscle force converts to energy of acceleration

  11. Closed system Energy cannot be dissipated by acceleration, energy of acceleration is absorbed as energy of resistance. • F = ma = mR (constant V) • R  Fthus  F  R

  12. Isokinetic Knee Extension and Flexion ~117° Torque curves of quadriceps and hamstring muscle groups of normal subjects performed at 22.5°·s-1 ~147°

  13. CYBEX II Isokinetic Device Shoulder Adduction and Abduction

  14. THE END

More Related