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Volleyball Physiology Understand your Joints
Volleyball Physiology Understand your Joints
Understand your Joints
Tuesday, 06 October 2009 14:50 | Written by Mark Harris | 
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You have a number of different types of joints in your body but the most common and relevant to Volleyball are what we refer to as Freely Moveable Joints or Synovial Joints. The table below describes the different parts of a joint.
|
Name
|
Purpose
|
|
| A | LIGAMENTS | Holds two bones together and keeps them in place. |
| B | SYNOVIAL FLUID |
Secreted by synovial membrane. It lubricates the joint. More is secreted when you warm up for your match. That's why the warm-up is so important to high perfromance players. |
| B | JOINT CAVITY | Gap between bones. Lubricates, as it is full of fluid. Keeps your joints ‘well oiled’ |
| C | CARTILAGE | Smooth covering at the end of bones for protection and to reduce friction |
| D | SYNOVIAL MEMBRANE | Lines the capsule and oozes a slippery liquid called Synovial Fluid. |
| E | JOINT CAPSULE | Outer bag or sleeve. Holds the bones together and protects joint. |
Types of Freely Moveable Joints
Joint
Movement
Where it is found
Ball and Socket
Free movement in every direction. Ø FlexionØ Extension Ø Abduction Ø Adduction Ø Rotation
Ø Hip joint (femur, pelvis)Ø Shoulder Joint (humerus, scapula)
Hinge Joint
This joint is like a hinge of a door. Allows us to straighten and bend our arms and legs.Ø Extension
Ø Flexion
Ø Elbow joint (humerus, ulna)Ø Knee joint (tibia, femur)
Pivot Joint
This joint can only rotate
Ø Rotation
Ø Neck (atlas and axis - top 2 vertebrae) Allows us to turn our head.Ø Radio-Ulna Joint- forearm
Joint
Movement
Where it is found
Ø Flexion
This joint can only rotate
Ø Rotation
Last Updated (Saturday, 19 June 2010 14:35)
