Hamstring Tightness
Hamstring Tightness
The purpose of this study is to find out if individuals with tight hamstring muscles who
 receive dry needling in addition to a standard stretching exercise program, show an
 improvement in hamstring tightness and function compared to individuals with tight hamstrings
 who receive either sham dry needling or no needling (blunt needle) in addition to a standard
 stretching program.
Tightness of the hamstring muscles is a risk factor for injury. Currently, there is no data
 on the effect of dry needling on hamstring extensibility or functional performance measures
 among asymptomatic individuals with hamstring muscle tightness. The investigator wants to
 assess if individuals with tight hamstring muscles who receive dry needling in addition to a
 standard stretching exercise program, exhibit reduced hamstring tightness and improved
 functional performance compared to individuals with tight hamstrings who receive either sham
 dry needling or no needling (blunt needle) in addition to a standard stretching program.
Inclusion Criteria:

 -  Hamstring 90/90 extensibility goniometric measurement of more than 20 degrees of knee
 flexion bilaterally

 -  Ability to perform a squat to 90 degrees of knee flexion without assistance of the
 upper extremities

 -  Asymptomatic during walking

 Exclusion Criteria:

 -  History of systemic neurological or arthritic condition

 -  History of bony or peripheral nerve trauma or surgery lower extremities

 -  History of treatment with dry needling

 -  No contraindications to dry needling