The Relationship Between the Strength and Fatigability of the Back Extensors and the Flexibility of the Hamstrings and Hip Flexors

The hamstrings (biceps femoris, semitendinosis, semimembranosis), hip flexors (iliopsoas, Sartorius, rectus femoris), and lumbar extensors (sacrospinalis) all have muscular origins on the pelvis. This indicates a possible relationship among these structures in that weakness or inflexibility of one structure may necessitate corresponding changes in flexibility, strength, or fatigability of another in order to maintain appropriate lumbar posture. · The purpose of this study is to determine the relationship between the hamstrings, hip flexors, flexibility and strength and fatigability of the lumbar extensors of intercollegiate football players. The subjects are current members of the Minnesota State University varsity football team. Static flexibility of the hip flexors and 90/90 hamstrings was measured using a 360° goniometer while the strength and fatigability of the lumbar extensors was assessed using a MedX Lumbar Extension machine. The subjects were also given an injury history questionnaire in order to determine previous or existing conditions of the lumbar spine and specific strength and flexibility deficits that may lead to an increased risk of injuries to the hamstrings, hip flexors, or back extensors. Data is currently being collected and final results and conclusions will be presented