Medicine and Health Sciences Commons^™

An Electromyographic Study Of Lower Trapezius Muscle Activity During The Traditional Muscle Testing Position And A Modified Position, Keri M. Doyle, Molly E. Mcdonald, Heather M. Partlow, Eric R. Paur

Physical Therapy Scholarly Projects

Many people use repeated overhead movements in their occupations or recreational activities. Literature has shown that this repeated overhead activity greatly contributes to the incidence of shoulder pathologies such as impingement syndrome. The purpose of this study was to establish whether the lower trapezius was more successfully recruited in the traditional muscle testing position of 145° of shoulder abduction or a modified position consisting of shoulder external rotation while in 80° of shoulder abduction and 90° of elbow flexion.

Forty-one subjects between the ages of 21 and 45 voluntarily participated in this study. One subject was excluded due to exceeding …

The Effects Of Torque Production Using A Stationary Hand-Held Dynamometer On Different Points Of The Forearm When Manual Muscle Testing Elbow Flexors, Justin Allred, Ross Homstad, Eugene Monette

Physical Therapy Scholarly Projects

Muscle testing using a stationary dynamometer has given therapists a more objective method of assessing a patient's strength. However, few studies have been performed as to the effects that dynamometer placement has on force production.

The purpose of this randomized, repeated measure study was to determine whether there was a significant difference in reliability between torque measurements with dynamometer placement at two well-defined points on the forearm. The differences in torque values from the two points of application (distal wrist crease and the midpoint of the forearm) were also compared to assess for differences between these values.

Thirty-two healthy subjects …

A Comparison Of Isokinetic Ankle Plantarflexion Force Generation In Knee Flexed And Knee Extended Positions, Reyn Hata, Delbert Peralta, Daniel Uyeunten

Physical Therapy Scholarly Projects

The triceps surae, composed of the soleus and the two heads of the gastrocnemius, is a very active muscle in all activities involving the lower extremities. This study compared the maximal force generated by these ankle plantarflexors in a knee extended and knee flexed position to determine relative contribution to plantarflexion force in varying positions. Eighteen male and female college students were tested for maximal concentric plantarflexor force generation isokinetically at 3D/sec in both positions. Means of maximal force in knee extension and flexion, 242.56 Ibs. and 227.22 Ibs., respectively, were found to be statistically significantly different. The mean of …

Electromyographic Analysis Of Lower Extremity Muscle Activity During Plyo Press Jump And A Vertical Jump, Leigh James Griffith, Kristen Michelle Olson, Daniel Kenneth Sinness, Steven Peter Thomas

Physical Therapy Scholarly Projects

Many training programs have been developed to aid in training the athlete with their goal of maximizing strength and performance. The Plyo Press machine was developed for training athletes enrolled in the Frappier Sports Acceleration Program. This machine was designed to couple strength training with plyometrics to enhance dynamic muscle activity and speed.

There has been limited research on the Plyo Press machine to support these claims. Therefore, the purpose of our study was to compare muscle recruitment during a vertical floor jump versus a plyojump in the Ply Press leg machine. EMG analysis of selected lower extremity muscles was …