Muscles: 
Quadriceps (4): - involved in knee extension & deceleration movements. 
     Rectus Femoris 
     Vastus Lateralis 
     Vastus Medialis 
     Vastus Intermedius 
Hamstrings (3): - involved in knee flexion & acceleration movements 
     Biceps Femoris 
     Semimembranosus 
     Semitendinosus 
Hamstring/Quad Strain: 
MOI: sudden overstretching 
Important factors: poor flexibility, improper technique, fatigue, imbalance of quad-Hamstring strength 
S&S: Limping, decreased ROM, decreased strength, increased muscle tone, pnt tenderness, possible ecchymosis or palpable gap. 
Treatment: Ice, Compression, Stretch, NSAID 
Quad Contusion: 
MOI: Direct blow 
S&S: Pnt tenderness, palpable knot or lump, increased muscle tone, decreased ROM, Decreased strength, Ecchymosis. 
Treatment: ICE, compression, light stretching 
post-acute- Ultrasound, and massage to avoid myositis ossificans(bone formation within the muscle tissue 
Adductor strain: Commonly referred to as a "Groin Strain" involved the adductor muscle group: Adductor magnus, adductor longus, adductor brevis, gracilis and to an extent, the pectineus muscles. 
This condition is usually positive with manual muscle testing of hip adduction. Pain with resisted hip flexion may elicit a false positive for adductor strain, but is indicative of a rectus femoris or satorius strain. 
HIP 
Bones: 
Femur 
Pelvis 
Joints: Hip joint( made up of the acetabular labrum, femoral head, and greater trochanter) 
Muscles: 
Gluteus medius 
Gluteus Minimus 
Tensor fascia latae 
Gluteus maximus 
Iliopsoas 
Sartorius - the longest muscle in the body 
Adductors (longus, magnus, brevis) 
Gracilis 
Hamstrings 
Quadriceps 
Iliac Crest Contusion (hip pointer) 
Contusion of illiac crest (usually ASIS) 
MOI: Direct blow 
S&S: mild swelling, ecchymosis, pnt tender 
Treatment: Ice, pad, e-stim, ultrasound 
Muscle strain (quad, illiopsoas, gracilis, sartorius adductor group) 
MOI: overstretching of the muscle or tendon 
S&S: swelling, ecchymosis, limited ROM, decreased strength 
Treatment: Ice, light stretching, wrap, heat, strength exercises 
Hip dislocation: 
MOI: direct blow, or severe twisting with foot planted 
S&S: deformity, loss of circulation 
Treatment: check circulation, activate EMS 
Trochanteric Bursitis(snapping hip syndrome) 
MOI: Direct blow or repetitive jumping or running 
S&S: Pain when palpating the greater trochanter, an audible and palpable snap 
Treatment: Rest, ice and stretch 
Ischial Bursitis: 
MOI: Direct blow or sitting for a prolonged period with legs crossed or on a hard surface 
S&S: tenderness over the ischial bursa 
Treatment: Ice, rest, ultrasound and stretch 
Slipped Capital Femoral Epiphysis 
Not a true athletic injury. Occurs in pre-adolescent or adolescent athletes 
MOI: growth disturbance in the capital femoral epiphysis and minor trauma 
S&S: pain in the groin but may have referred pain in knee or anterior thigh, limited ROM of hip 
Treatment: Refer to physician