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Quadriceps Strains. Predisposing Factors. Contact Sports Any cardiovascular problem that leads to decreased circulation Obesity Poor nutrition Previous thigh injury Poor muscle conditioning Muscle fatigue. Mechanism of injury. Prolonged overuse Violent single blow
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Predisposing Factors • Contact Sports • Any cardiovascular problem that leads to decreased circulation • Obesity • Poor nutrition • Previous thigh injury • Poor muscle conditioning • Muscle fatigue
Mechanism of injury • Prolonged overuse • Violent single blow • Tension forces on the quad muscles causing an overstretch
Signs and Symptoms • Pain with knee extension and passive stretch • Muscle spasm • Swelling • Loss of strength • Crepitation • Point tenderness over injury site • Ecchymosis • Defect in the muscle (third degree)
Examination and Evaluation • Palpation • Rectus femoris • Vastus lateralis • Vastus medialis • Vastus intermedius
Examination and Evaluation • Muscle Testing • A, RROM Knee Extension • A, RROM Hip Flexion • Passive stretch quadriceps muscle (combined knee flexion and hip extension)
Classifications • Mild (Grade 1) – Slightly pulled without tearing of muscle tendon or fibers. No loss of strength • Moderate (Grade 2) – Tearing of fibers in the muscle, tendon, or attachment to the bone. Strength is diminished. • Severe (Grade 3) – Rupture of muscle-tendon-bone attachment with separation of fibers. Requires surgical repair
Referral/Diagnostic Procedure • Orthopedic surgeon – for third degree.
Treatment and management • Cryotherapy – knee flexed positon • Cold whirlpool • NSAIDS • Ultrasound • Massage
Rehabilitation • Stretching • Isometric muscle contraction – Quad sets • Straight leg raises • Knee extensions • Abduction exercises • Adduction exercises • PNF
Protection and Return to Competition Factors • Sport specific strength and conditioning program • Warm-up and cool-down • Protective equipment such as thigh pads • Neoprene sleeve for compression and support
For More Information • http://www.injuryupdate.com.au/quadriceps_strain.htm • http://www.sportsinjuryclinic.net/cybertherapist/front/frontthigh/quadstrain.htm • http://www.worldortho.com/oxsportsmed/chapt11.html#part5 • http://www.mdadvice.com/library/sport/sport183.html