Digital Commons Network^™

Electromyographic (Emg) Activity Of The Gluteus Medius During Various Hip Exercises, Kalie Maiden, Mitchell Karbo, Taylor Doeden, Analise Richtsmeier

Physical Therapy Scholarly Projects

Background and Purpose. The purpose of the study was to record and analyze muscle recruitment patterns of the gluteus medius and gluteus maximus muscles when performing a side lying abduction exercise requiring consistent force to roll a ball up and down the wall using the dominant lower extremity. Comparisons were made between the use of either a small, medium or large ball. The subjects performed a standing abduction exercises with theraband around both ankles as well.

Case Description. Fifteen subjects were recruited from the University of North Dakota Department of Physical Therapy to perform the four different types of exercises. …

An Electromyographic Study Of Hip Muscle Activity In Varying Subtalar Joint Positions: Implications For Anterior Cruciate Ligament Injury Risk, Holly Augustine, Allison Biwer, Greg Jorgensen, Mitch Kary

Physical Therapy Scholarly Projects

Purpose: The purpose of this study is to determine if subtalar joint position affects the activity of hip musculature in static standing, and by those results imply a correlation between foot position and ACL injury risk.

Methods: Thirty participants took part in this randomized study in which EMG data were collected during 3 trials of 3 subtalar joint positions on the right lower extremity. Subtalar joint positions included a flat surface to represent a neutral subtalar position, a 5-degree incline rising from lateral to medial, promoting a supinated attitude of the foot, and the third position was on a 5- …

Electromyographic Analysis Of Lower Extremity Muscle Activity During Wall Squats With An Adduction Contraction In Varied Foot Positions, Jill Eken, Ashlee Jesperson, Heather Sletten

Physical Therapy Scholarly Projects

Purpose: The purpose of this study was to determine if an isometric hip adduction contraction and varied foot positions during a wall squat results in increased muscle recruitment of the lower extremity.

Subjects: Eleven healthy female adult volunteers without a prior history of knee pathology participated.

Methods: Surface electromyography (EMG) data were collected from the adductor longus (AL), vastus medialis oblique (VMO), vastus lateralis (VL), biceps femoris (BF), gastrocnemius (GN) and anterior tibialis (AT) muscles of the dominant leg for each individual during six wall squats with different treatment conditions. Experimental trials included three different rotation positions with or without …

Muscle Activation During Simulated Patient Transfers: Preliminary Study Of Experienced Versus Novice Patient Handlers, Benjamin Mitchell, Patrick Septon

Physical Therapy Scholarly Projects

Purpose: Back injuries are a common problem in providing health care and manually transferring patients can be a cause of back injuries. Because of this fact, there has been a need for research looking into safe methods for manually transferring patients. The intent of this study was to compare muscle recruitment patterns of novice and experienced health care professionals during a simulated patient transfer. By comparing the muscle activity of the experienced group to that of the novice group, we hoped to see differences that could be used to refine training techniques, thus increasing the safety of novice health care …

Electromyographic (Emg) Analysis Of Trunk Muscles At The Point Of Puck Contact During Slap And Wrist Shots Of Female Ice Hockey Athletes, Lon Donald, Kristi Kjellgren, Jodi Young, Michael Young

Physical Therapy Scholarly Projects

The number of female hockey players has increased significantly in the last decade. The first recorded female hockey game was in Ottawa in 1889. Since that time, hockey has spread into the United States .. Today, USA Hockey, Inc. reports 40,000 registered females and the Canadian Hockey Association has 55,000 female hockey players. Despite the rising popularity of the sport among females, there is little research specifically related to female hockey players.

Golf, tennis, and hockey swings utilize similar rotational components about the trunk. Trunk rotation is controlled and produced by the erector spinae, external oblique and rectus abdominus muscles. …

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 …

Emg Analysis Of Lower Extremity Muscle Activity During Wall Slides With Varying Foot Positions, Jon Beach, Neil Feist, Mike Hiscock, Ryan Stromme

Physical Therapy Scholarly Projects

Knee injuries are among the most common injuries seen in a physical therapy clinic. Nearly all rehabilitation programs following a knee injury involve quadriceps muscle strengthening. One popular and safe method of quadriceps strengthening often used is the wall slide. There is, however, debate and little research indicating whether or not changing the foot position used during wall slides alters the muscle activity during this exercise.

The purpose of this study was to provide a better understanding of the muscle activity during wall slides with feet in various positions so that more accurate rehabilitation protocols may be developed in the …

An Emg & Motion Analysis Study Of The Elliptical Trainer, Chris Hansen, Jaime Horner, Filip Johnson, Emily Wolkomir

Physical Therapy Scholarly Projects

Background and Purpose

The purpose of this study is to describe lower extremity muscle activity and joint range of motion while moving both forward and backward on an elliptical trainer at minimum and maximum inclines.

Subjects

Ten healthy subjects (7 female and 3 male) gave informed consent to voluntarily participate in this study.

Methods

A single group experimental design was used. A maximum contraction was performed for comparison measure and electromyographic (EMG) data was collected while the subjects performed the stride at the specified variables.

Results

The vastus lateralis was the most active of all the muscles throughout the entire …

An Electromyographic And Motion Analysis Study Of An Elliptical Trainer, Sarah Mannel

Physical Therapy Scholarly Projects

Americans are increasingly interested in exercising to increase fitness and reduce the risks of disease. One of the latest machines used to accomplish this goal is the elliptical trainer, a combination stair stepper, treadmill, exercise cycle, and cross-country ski machine. The purpose of this study was to describe muscle activity and joint range of motion while moving both forward and backward on an elliptical trainer at different inclines.

Six subjects between the ages of twenty-two and twenty-five years rode an elliptical trainer backwards and forwards at different inclines for four trials. Electromyographic activity of eight lower extremity muscles was calculated …

An Electromyographic And Motion Analysis Study Of An Elliptical Trainer, Jennifer Tveit

Physical Therapy Scholarly Projects

Americans are increasingly interested in exercising to increase fitness and reduce the risks of disease. One of the latest machines used to accomplish this goal is the elliptical trainer, a combination stair stepper, treadmill, exercise cycle, and cross-country ski machine. The purpose of this study was to describe muscle activity and joint range of motion while moving both forward and backward on an elliptical trainer at different inclines.

Six subjects between the ages of twenty-two and twenty-five years rode an elliptical trainer backwards and forwards at different inclines for four trials. Electromyographic activity of eight lower extremity muscles was calculated …

An Electromyographic And Motion Analysis Study Of An Elliptical Trainer, Kristin Sweeney

Physical Therapy Scholarly Projects

Americans are increasingly interested in exercising to increase fitness and reduce the risks of disease. One of the latest machines used to accomplish this goal is the elliptical trainer, a combination stair stepper, treadmill, exercise cycle, and cross-country ski machine. The purpose of this study was to describe muscle activity and joint range of motion while moving both forward and backward on an elliptical trainer at different inclines.

Six subjects between the ages of twenty-two and twenty-five years rode an elliptical trainer backwards and forwards at different inclines for four trials. Electromyographic activity of eight lower extremity muscles was calculated …

An Electromyographic Study Of Lower Trapezius Muscle Activity During Exercise In Traditional And Modified Positions, Erika Engelstad

Physical Therapy Scholarly Projects

Shoulder rehabilitation commonly overlooks the influence of scapular muscles in providing the stability necessary for the shoulder to function properly. When considering muscles acting on the scapulothoracic articulation, literature suggests that the lower trapezius is a key stabilizer of this articulation. Traditionally, the lower trapezius is exercised while the patient is in a prone position with the humerus abducted 1450 while performing forward elevation. Unfortunately, repeated overhead activity has been proven to increase the incidence of shoulder impingement. In an effort to avoid exercising the lower trapezius in a position that would compromise the shoulder complex, a modified position of …

An Electromyographic Study Of Lower Trapezius Muscle Activity During Exercise In Traditional And Modified Positions, Rebecca Lee. Johnson

Physical Therapy Scholarly Projects

Shoulder rehabilitation commonly overlooks the influence of scapular muscles in providing the stability necessary for the shoulder to function properly. When considering muscles acting on the scapulothoracic articulation, literature suggests that the lower trapezius is a key stabilizer of this articulation. Traditionally, the lower trapezius is exercised while the patient is in a prone position with the humerus abducted 1450 while performing forward elevation. Unfortunately, repeated overhead activity has been proven to increase the incidence of shoulder impingement. In an effort to avoid exercising the lower trapezius in a position that would compromise the shoulder complex, a modified position of …

A Comparison Of The Maximal Torque Production Of The Quadriceps Muscle During Morning And Afternoon Strength Assessment, Shawn Mccoul

Physical Therapy Scholarly Projects

The purpose of this study was to compare maximal quadriceps torque production in early morning hours to afternoon hours. Thirty male subjects volunteered to participate in this study and were randomly assigned to an AM or PM testing session. At least one week after the first test, the subjects completed a similar test in the opposite time slot. Each subject was positioned on the Kin-Com (Chattecx Corp., Chattanooga, 'IN) dynamometer and performed six maximal concentric isokinetic repetitions of knee extension at 600/s between the ROM of 10° and 80° of knee flexion. The AM/PM ratios indicated no significant difference between …

A Comparison Of The Maximal Torque Production Of The Quadriceps Muscle During Morning And Afternoon Strength Assessment, Denise Willardsen

Physical Therapy Scholarly Projects

The purpose of this study was to compare maximal quadriceps torque production in morning hours (AM) to maximal quadriceps torque production in afternoon hours (PM). Thirty healthy male subjects between the ages of 19 and 45 were tested during an AM and a PM session on the Kin-Com dynamometer. A trial of six concentric isokinetic contractions of the right quadriceps were tested at a speed of 60° Is. The maximal peak torque measurements were compared between the AM and the PM sessions to establish the accuracy of results taken at differing times of the day. No significant difference in strength …

Electromyographic And Motion Analysis Of The Trunk And Pelvis During The Golf Swing, Christopher Lugibihl

Physical Therapy Scholarly Projects

The purpose of this study was to analyze and compare the trunk muscle activity and range of motion in male and female golfers. With the use of surface electrode electromyography and motion analysis, three male and three female Division II collegiate golfers were evaluated. The EMG activity of the erector spinae, gluteus maximus, and external oblique muscles was measured bilaterally during the golf swing. The main emphasis in analyzing the trunk range of motion was comparing relative pelvis to shoulder rotation (X-factor) throughout the swing. The researchers found definitive differences in the patterns of muscle activity and range of motion …

An Electromyographic And Video Motion Analysis Study Of Elite Sprinters At Varying Speeds And Inclines, Erica Fretland

Physical Therapy Scholarly Projects

Background and Purpose: The purpose of this study is twofold 1) to describe muscle activity and joint motion while running on a treadmill at different speeds and inclines and 2) to examine whether or not running on a treadmill at high speeds and on an inline causes particular muscles to work harder or the sprinter to change their running technique to accommodate the increased workload.

Subjects and Methods: EMG and motion analysis data was collected from six subjects while they were running on a treadmill, first at twenty miles per hour at zero percent grade and then at thirteen miles …

An Electromyographic Study Of Back And Lower Extremity Muscle Activity During A Traditional Squat And The Plyo Press Leg Press, Heidi C. Ivesdal

Physical Therapy Scholarly Projects

Strength training is a primary factor in athletics and rehabilitation. Lower extremity strength training has traditionally consisted of free weights, biomechanically designed weight machines, or plyometrics. The Plyo Press is a new machine that is currently being utilized in the Frappier Acceleration Program for athletes. It is specifically designed for lower extremity strength training in combination with plyometrics. The principle behind its design is to build strength in the most effective way to enhance speed and dynamic activity without the stress to the low back or legs that is present with the use of free weights.

Because the Plyo Press …

The Effect Of Interset Rest Period Length On Quadriceps Muscle Recovery In Strength Training, Jesse J. Wosick

Physical Therapy Scholarly Projects

Lower extremity strength training is one of the skills performed by physical therapists. The purpose of this experiment was to measure the percent of recovery of the quadriceps muscles after specified interset rest period lengths to obtain the optimal interset rest period length between sets in strength training.

Twelve male and twelve female healthy subjects were divided into three equal groups of eight (four males, four females). The subjects performed two sets of six repetitions of unilateral isokinetic knee extension with their dominant lower extremity on the Chattanooga KIN-COM Dynamometer. One, two, or three minute interset rest period lengths were …

Plyometrics, Cynthia K. Flom

Physical Therapy Scholarly Projects

Plyometrics are a form of exercises in which an isometric-type overload, using the myotatic (stretch) reflex, is produced by means of an eccentric (lengthening) contraction, with the muscle being fully stretched immediately preceding the concentric (shortening) contraction. How fast the muscle switches from an eccentric to a concentric contraction will determine the athlete's power. The goal behind plyometric exercise is to train the nervous system to react with maximum speed to the lengthening of muscle and to develop the muscle's ability to shorten rapidly with maximal force. Plyometrics are first found in the literature in 1966 containing the work done …

A Comparison Of Concentric And Eccentric Resistance Training On Muscle Hypertrophy, Mark A. Romanick

Physical Therapy Scholarly Projects

This study was undertaken to determine whether concentric or eccentric muscle action was more likely to induce muscle hypertrophy when exposed to a prolonged heavy resistance exercise program. Fifteen males and 14 females who were not currently or recently involved in a heavy resistance training program for the lower extremities were selected for the study. One group (n = 10) exercised in a concentric fashion, another group (n = 9) exercised in an eccentric fashion, and a third group (n = 10) served as a control group, performing no resistive exercise. The exercising subjects performed three sets of 10 repetitions …