Hamstring Length Test (@ 90/90) | Rationale & Demonstration

The video tutorial explains the hamstring muscle length test, also known as the 9090 test. It describes the procedure, where the patient lies in a supine position with the hip and knee at 90 degrees. The physical therapist stabilizes the thigh and extends the knee to measure hamstring length. Normal range is defined as a knee angle between full extension and 20 degrees short. A positive test indicates hamstring tightness if the knee is more than 20 degrees short of full extension. The video also covers how to measure knee angles and interpret results.

What is the initial position of the patient during the hamstring muscle length test?

• Standing with hip and knee at 90 degrees

• Supine with hip and knee at 90 degrees

• Sitting with hip and knee at 90 degrees

• Prone with hip and knee at 90 degrees

What is the role of the PT's left hand during the test?

• To measure the knee angle

• To stabilize the distal thigh

• To extend the knee

• To support the patient's back

What knee angle range is considered normal during the test?

• 20 degrees short to 40 degrees short

• 10 degrees short to 30 degrees short

• Full extension to 20 degrees short

• Full extension to 10 degrees short

Which body landmarks are used to measure knee angles?

• Left greater trochanter, left medial epicondyle, left medial malleolus

• Right greater trochanter, right medial epicondyle, right medial malleolus

• Left greater trochanter, left lateral epicondyle, left lateral malleolus

• Right greater trochanter, right lateral epicondyle, right lateral malleolus

What indicates a positive test for hamstring tightness?

• Knee angle less than 10 degrees short of full extension

• Knee angle more than 10 degrees short of full extension

• Knee angle less than 20 degrees short of full extension

• Knee angle more than 20 degrees short of full extension