Medicine and Health Sciences Commons^™

Electromyographic Activity Of Hamstrings And Quadriceps Muscle During Jumping And Landing: Pilot Study, Jayla Greene, Brecca Wahlund, Jay Mittlieder, Adam Lutz

Physical Therapy Scholarly Projects

Background and Purpose. The purpose of this pilot study was to see if there was a difference in amount of electromyographic (EMG) activity in the quadriceps (vastus medialis and vastus lateralis) compared to amount of EMG activity in the hamstrings (biceps femoris and semitendinosus) in active male and female subjects during vertical jumping and landing. In addition, we looked at the amount of knee flexion that occurred in the male and female subjects shortly after landing from a vertical jump.

Methods EMG activity was recorded using a Noraxon TeleMyo DTS telemetry unit with a sampling rate of 1 kHz. EMG …

Emg Analysis Of Latissimus Dorsi, Erector Spinae, And Middle Trapezius Muscle Activity During Spinal Rotation: A Pilot Study, Hunter Huberty, Jacob Klingbeil, Michael Miller, Michael Utt

Physical Therapy Scholarly Projects

Purpose/Hypothesis: Rotation of the spine is a common movement used for completing daily activities and participating in sports. As a contributing factor to back injuries, the performance of spine rotation is an important consideration for the rehabilitation and prevention of future back injury. Muscles involved in spine rotation have been researched, though limited findings exist for one of the largest back muscles: Latissimus Dorsi (LD). The LD muscle contributes to many movements of the trunk and limbs given its multiple attachment sites including the pelvis, scapula, ribs and humerus. Influence of the LD on spine rotation, however, has not …