1 / 7

Muscle Performance

Muscle Performance. Muscle Characteristics. Irritability ability to respond to a stimulus Conductivity propagate a stimulus Adaptability ability to change structure Contractility ability to modify length (shorten). Muscle Contraction. Isometric: No change in muscle length

celine
Download Presentation

Muscle Performance

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. Muscle Performance

  2. Muscle Characteristics • Irritability • ability to respond to a stimulus • Conductivity • propagate a stimulus • Adaptability • ability to change structure • Contractility • ability to modify length (shorten)

  3. Muscle Contraction • Isometric: No change in muscle length • Isotonic: Change in length (same external weight) • Concentric: muscle length shortens during contraction • Eccentric: muscle length increases during contraction • Isokinetic: Angular speed is constant during contraction • Concentric • Eccentric

  4. Role of Muscle (p170) • Agonist: (prime mover) functions to cause a movement • Antagonist: functions to resist movement • Stabilizer: functions to fixate an area so another movement can occur • Synergist: assist another muscle • Neutralizer: functions to prevent undesired movement

  5. Length-Tension Relationship of Muscle Contraction • The amount of force generated by a muscle is dependent on length of muscle. • Muscles that cross two joints • concurrent movements at both joints not maximized

  6. Force-Velocity Relationship of Muscle Contraction • The amount of force generated by muscle is dependent on the velocity of contraction.

  7. Summary • Muscle characteristics • Types of contraction • isotonic, isometric, isokinetic, concentric, eccentric • Role of muscle • agonist, antagonist, synergist, stabilizer, neutralizer • Muscle force dependent on • length-tension relationship • force-velocity relationship

More Related