Effects of Elastic Therapeutic Tape on Biomechanical Changes of Knee Joint During Drop Vertical Jump in ACL Injuries

#Participants ACL-injures subjects ACL-injury group will be recruit people with ACL-injuries with grade I-II at least 8 weeks by measuring joint laxity test by stress X-ray with Telos (side to side difference between 3 - 8 mm.) .

Inclusion criteria of ACL-injuries group are: 1) no collateral ligaments and meniscus injuries , 2) no joint pain and knee joint effusion (less than 2 cm. from the opposite side measuring at joint line, 3) no history of previous injuries in other structure of lower extremities that resulted in ligamentous laxity at ankle and hip, 4) no current medical problems such as vestibular system, visual system or neurological condition that can impair their ability to perform a sidestep cutting task, 5) no joint and structural deformity such as flat feet, genu valgus and genu varus, 6) able to complete functional test (Single hop for distance and Triple hop for distance) which the distance is not less than 85% of unaffected side .

Exclusion criteria included 1) knee joint swelling is greater than 2 cm. of unaffected side, 2) joint laxity test by stress X-ray with Telos (side to side difference greater than 8 mm.)

• Instrumentation

1. Three-dimensional motion analysis system (Bioengineering Inc., ITALY)
2. Visual 3D software (C-motion, USA)
3. A force platform with 60x40x10 centimeters in size (Kistler Instrument Corp., USA)
4. Running shoes (Adidas) US Size 7 , 8 , 9, 10
5. Goniometer
6. Vernier caliber
7. Measuring tape
8. Therapeutic tape ; (KinesioTex®)
9. Telos arthrometer GA III/E (Metax GmbH)
10. International Knee Documentation Committee Score (IKDC)
11. Knee Osteoarthritis Outcome Score (KOOS)

• Subject preparation for participants with ACL-injuries Participants will be asked to fill in a questionnaire about age, height, weight and history of injury or musculoskeletal problems. Participants will be informed to make understanding of purposes, methods and advantages of the study. Also, all participants will be asked to sign a consent form. IKDC and KOOD interviews will be conducted.The test including hop test and drop vertical jump will be conducted at Faculty of Medicine Ramathibodi, Mahidol University.