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Sports Biomechanics -- 07042013

Tennis Elbow
Tennis elbow often occurs with the forearm muscle group because of incorrect force application in that area or due to long-term repetitive use of the elbow joint. These kinds of pain usually occur about 1-2 cm below the humerus lateral epicondyle, and the ache may extend from the forearm muscle to the back of the wrist. The elbow support’s main function is to keep the joint in the little curved position so that the arm muscles may rest and relax.

Sports Biomechanics -- 06112013

Carpal Tunnel Syndrome
The Carpal Tunnel Syndrome means the volume of carpal tunnel is decrease by compression of wrist nerve it’s cause by when the wrist bear the intensive, repeated, excessive activity for a long term the wrist musculature will be narrow. This condition is usually seen on using computer mouse and keyboard for a long term.

Sports Biomechanics -- 05272013

Knee joint
The knee joint is mainly with four ligaments. The function is to keep knee stability. It is PCL, ACL, MCL & LAL respectively. PCL & ACL joins the thigh and shinbone and the form of crossing. The purpose is to keep the stability of the front and rear of knee joint. MCL joins the thigh and shinbone inside. LAL joins thigh and fibula. MCL & LAL helps the stability of horizontal displacement of knee joint. MCL & LAL helps the stability of horizontal displacement of knee joint.
Human gait is divided into six parts:
  1. heel strike
  2. full forefoot load
  3. mid-stance
  4. heel life
  5. toe off
  6. mid-stance

The human walks to utilize muscles to let the leg be swung and reached the purpose to advance.
The knee joint will have phenomenon moved forward when mid-stance to heel strike. It causes the injury that PCL function prevents moved forward. If move forward and backward the knee joint happens.
ACL prevents the knee joint to move backward when toe off to mid-stance. The knee joint bears the weight of the body when heel strike to heel life. The knee joint offers the equilibrium body. The knee joint will bear to the strength of different directions. MCL & LAL helps steady right & left direction of the knee joint.

Sports Biomechanics -- 05072013

Knee support
Wrapping up and covering the knee joint helps the ligament to increase stability. Because the injured ligament will let the knee joint be unstable have to wrap up and cover to help of knee joint to support. Knee support has not strengthened protecting to the special injury of knee joint only by the support of the whole area of it. Knee support can not support the serious ligament injury only suitable for protecting the slight injury.
Knee stabilizer
Utilize stabilizer to strengthen the support of ACL & PCL. If move forward and backward the knee joint happens, stabilizer can be reduced moved and gone back fast. Knee stabilizer does not have special protection to MCL & LCL.
Hinged knee brace
Protect the injured ligaments of knee joint and prevent being injured again. Hinged knee brace protects more serious ligament injury. Including the ligaments of many places are injured or ruptured. It is not stable and supporting to cause the knee joint. Hinged knee brace supports differently in accordance with different material and different constraint. Suitable for different knee joints injure.

Sports Biomechanics -- 04182013

Manufacturers generally group knee braces into three main classifications, namely, a prophylactic brace, a functional brace or a rehabilitative brace.
(1)Prophylactic brace
A Prophylactic brace is made up of a unilateral or bilateral brace and a pivot. It has been shown that a prophylactic brace may reduce anywhere from 10% up to 30% of the external forces applied onto such prophylactic brace (Martin, 2001). The prophylactic brace protects the knee by preventing excessive twists causing ACL (anterior cruciate ligament) and MCL (medial collateral ligament) injury. Athletics engaged in strenuous sports such as football players often use prophylactic braces because this knee brace offers enough rigidity to protect the knee joint and simultaneously does not intervene with the normal functions of the knee.
(2) Functional brace
A functional brace provides the knee with better flexibility. One often uses a functional brace after an ACL (anterior cruciate ligament) operation (anywhere from 6 to 12 months) or if one has gonarthritis. A functional brace minimizes the rotation and displacement of the knee joint, and this allows for the recovery of the knee joint. The pivot restrains the over activity of the knee joint and thus prevents the knee from overuse. A functional brace further prevent the knee joint from settling in an incorrect posture and thus helps avoid the same injuries from occurring again.
(3) Rehabilitative brace
A rehabilitative brace protects the injured ligament and restricts activity before and after an operation of the knee joint. Specifically, a rehabilitative brace is usually used 4 to 8 weeks after a knee operation. A rehabilitative brace normally has a foam cushion to wrap up the thigh and a cushion to fix and limit both sides of the knee joint. A rehabilitative brace often comes with a pivot that is used to control the angle with crooked knee joint and also with a belt to fix the support position.