Hamstring Strain

most commonly injured mm is ____ due to _____ shape

biceps femoris, pennate

sports with highest freq =

track, soccer, football, rugby

risk factors

• sports with ____ running

• previous history of ____ injury/___ strain

• >_____yrs old

• ____ pelvic tilt

• _____

• ____ and ____ weakness

• previous _____

high speed, ACL, calf, 23-25, anterior, stiffness, trunk, glute med, hamstring injury

2 main MOI

eccentric overloading and overstretch

position of injury

hip flexion, knee extension

hamstring strains are classified by 3 things:

muscle involved, anatomic location, severity (grade)

3 anatomical location of injury

muscle belly, musculotendinous junciton, tendon

s/s of hamstring strain

• _____ pain associated with an event

• ____/____ feeling at time of injury

• _____ defect

• decreased ROM knee ext with ____

• pain with _____

• pain/weakness with _____

posterior thigh, tearing, pop, palpable, SLR 90-90, stretch, MMT

special tests for hamstring strain

SLR 90-90, heel drag, reverse plank

SLR 90-90 = 0-15 degrees from full extension = _____

mild

SLR 90-90 = 15-25 degrees from full extension = _____

moderate

SLR 90-90 = 25+ degrees from full extension = _____

severe

strength testing

• test position 1 =

• test position 2 =

• test position 3 =

prone 90, prone 15, supine 90/90

two keys to treatment

early mobility and eccentrics

treatment - early mobility

• first ____ days = ____ phase scarring

• early ____ ROM

• _____ to organize scar tissue

• avoid ____

2-6, inflammatory, hip/knee, STM, stretching

criteria for progression - phase I and II

• no pain with MMT at _____ degrees

• knee rom = <___% asymmetry with 90/90 SLR

• hip rom = negative _____ test

• <____% asymmetry with HHD MMT at ____ degrees

• <____% asymmetry with HHD MMT prone ____

• negative ____ test

15, 10, thomas, 10, 15, 10, hip ext, slump

criteria for progression - phase III

• no pain with ____

• <___% asymmetry with isokinetic testing

• SL bridge test = >____ reps and within ___% of the other side

• <____% asymmetry with _____ test

• ____ reps of ____ patterns with good form, strength and endurance

palpation, 10, 25, 10, 10, hop, 25, PNF

highest risk of reinjury at _____ weeks from initial injury

8

most re-injurys occur withing ____ weeks of return to play

1-2

scar tissue remodeling takes ____ yrs

2

3 keys to hamstring strain prevention

length, eccentric stretch, high speed running

best eccentric hamstring exercise

nordics

_____ gets hamstrings to maximal contraction

high speed running