TY  - SER
AU  - 
AU  - 
AU  - 
AU  - 
AU  - 
TI  - Effects of performing an abdominal drawing-in maneuver during prone hip extension exercises on hip and back extensor muscle activity and amount of anterior pelvic tilt
PY  - 2007///
CY  - Estados Unidos: 
PB  - Journal of orthopaedic & sport physical therapy
ER  -