Life Sciences Commons^™

Neuromechanical Alterations Due To Induced Knee Pain And Effusion During Functional Movements, Jihong Park

Theses and Dissertations

Purpose: Examine neuromechanical alterations due to isolated and/or combined knee pain and effusion in functional movements. Methods: A 4X3 randomised controlled laboratory study with repeated measures was used. Nineteen, healthy volunteers (age: 22.4 ± 2.4 years) underwent four different treatments (control, effusion, pain, and pain/effusion) with a week wash out period. Ten near-infrared cameras with 43 reflective markers, 12 surface EMG electrodes, and two ground-embedded force platforms were used to record neuromechanical changes during functional movements (walking and drop landing). To induce pain, 5% sodium chloride (1 ml) was injected into the infrapatellar fat pad. To induce effusion, 0.9% sodium …

The Effects Of Whole Body Vibration On Dorsiflexion In Chronic Ankle Instability, Lesley Abigail Thalman

Theses and Dissertations

BACKGROUND: Whole body vibration (WBV) platforms are currently used as adjunctive training devices for exercise programs, and have been shown to facilitate flexibility. One of the biggest contributing factors to chronic ankle instability (CAI) is the lack of dorsiflexion after lateral ankle sprains and WBV may be an effective way to increase range of motion in this population. PURPOSE: Determine if WBV done concurrently with static stretching (SS) is more effective then SS alone in improving dorsiflexion ROM in subjects with CAI. METHODS: Subjects were divided into 3 groups (control, static stretch, and static stretch and vibrate). Subjects stretched 4 …

Dietary Fiber Consumption And Insulin Resistance: The Role Of Body Fat And Physical Activity, Charity B. Breneman

Theses and Dissertations

Background: This study was conducted to determine the association between fiber intake and insulin resistance in 264 women using a cross-sectional design. Methods: Insulin resistance was indexed using HOMA-IR (fasting insulin (μU/mL)×fasting glucose (mg/dL)/405). HOMA-IR values were log transformed. Fiber and energy consumption were assessed using 7-day weighed food records. Fiber was expressed as grams per 1000 kilocalories. Body fat percentage (BF%) was measured using the BOD POD and physical activity (PA) was ascertained using Actigraph accelerometers worn for 7 consecutive days. Results: (Mean±SD) age: 40.1±3.0 years, glucose: 86.7±5.9 mg/dL; insulin: 7.1±4.3 μU/mL; HOMA-IR: 1.5±1.0; fiber intake …

Effect Of Experimentally-Induced Anterior Knee Pain On Postural Control, Emily Elizabeth Falk

Theses and Dissertations

Context: Knee pain is experienced by many people. Because of this, authors have started researching the effects of pain on lower extremity mechanics and also on static and dynamic postural control. However, the effects of pain are difficult to study due to associated confounding variables. Objective: We asked: (1) Will experimentally-induced anterior knee pain alter perceived pain using the visual analogue scale? ; (2) will perceived pain affect postural control as measured by center-of-pressure during static and dynamic movement? Design: Crossover. Setting: Biomechanics laboratory. Participants: Fifteen healthy subjects. Intervention: Each subject participated in single leg quiet stance, landing, and walking …

The Effect Of An Acute Bout Of Exercise On Food Motivation, Energy Intake, And Total Physical Activity In Normal-Weight And Obese Woman: An Event-Related Potential Study, Nonie Erin Bliss Hanlon

Theses and Dissertations

This study examined the effect of acute exercise on food motivation, energy intake, and total physical activity in normal-weight and obese women. Participants of both groups were matched (except for Body Mass Index) and conditions (exercise vs. non-exercise) were randomized and counter-balanced. Eighteen normal-weight and 17 obese women completed an exercise and non-exercise day, each performed on the same day of the week. Exercise was performed on a motor-driven treadmill at 3.8 mph and 0% grade for 45 continuous minutes. To test for food motivation, participants were shown a continuous stream of pictures of food and flowers (control) while neural …

Real-Time Feedback As A Method Of Monitoring Walking Velocity During Gait Analysis, Sarah T. Ridge, James G. Richards

Faculty Publications

When quantifying the mechanics of gait, it is important to ensure that subjects maintain a consistent walking velocity during gait analysis trials. Most methods of measuring walking velocity do not produce data until after the subject has completed the trial. This often results in discarding completed trials from analysis because the subject's velocity was not within an acceptable range. Real-time feedback of position data can be used to help subjects adjust their walking velocity during the trial, when necessary. Results from 14 subjects who participated in gait analysis using real-time feedback to monitor their walking velocity show that they were …

The Effect Of Local Heating On The Concentration Of Interstitial Atp In Human Skin, Jayson R. Gifford

Theses and Dissertations

Skin blood flow (SKBF) demonstrates a biphasic response to innocuous, local heating. Much about the mechanism of the first phase is unknown. A type of ion channel (TRPV3) sensitive to and increasingly activated by temperatures from ~33 to ~45°C may be involved. TRPV3 channels are abundantly located in the keratinocytes and are believed to elicit the release of ATP, a putative cutaneous vasodilator, upon activation. This study investigated the possibility that TRPV3 channels and ATP have a role in the first phase of the SBKF response to local heat. Fifteen young, healthy subjects participated in the study. Two microdialysis probes …

Effect Of High-Speed Treadmill Training With A Body Weight Support System In A Sport Acceleration Program, Carie Suzanne Eastman

Theses and Dissertations

Introduction: Maximum running acceleration essential components in many sports. The identification of specific training protocols to maximize sprint speed would be useful knowledge for soccer coaches and players.

Purpose: The purpose of this study was to determine the effect of a high-speed treadmill with the use of a body-weight support system in a 6-week sport acceleration program on: 40-yard sprint time, maximal isometric knee flexor and extensor strength.

Methods: 32 female soccer players (age 16 ± 1.19 yrs) participated in two treatment groups and one control group. Both treatment groups participated in a 12-session sport acceleration program. The first treatment …

Kinematic Changes During A Marathon For Fast And Slow Runners, Maggie Man-Yee Chan-Roper

Theses and Dissertations

The purpose of this study was to describe kinematic changes that occur during an actual marathon. We hypothesized that (1) certain running kinematic measures would change between miles 5 and 25 of a marathon and (2) fast runners would demonstrate smaller changes than slow runners. Subjects (n = 179) were selected according to finish time (Range = 2:20:47 to 5:30:10). Two high-speed cameras were used to measure sagittal-plane kinematics at miles 5 and 25 of the marathon. The dependent variables were stride length, ground time, peak knee flexion during support and swing, and peak hip flexion and extension during swing. …

Comparison Between The Trap Bar Dead Lift And Back Squat Exercises On Vertical Jump, Douglas A. Young

Theses and Dissertations

The ability to produce power during competition is essential. Football requires explosive power in order to get off the ball faster, increase speed of the first step, and increase the height of the vertical jump. Most strength training professionals use the back squat to increase power of the lower extremities; however, as large forces are placed on the back, athletes are at greater risk for injury. The trap bar dead lift is similar to the back squat in movement and form, but the trap bar dead lift reduces the force on the lower back. After testing for maximum vertical jump,athletes …

The Effects Of The Rebound Diathermy Unit, Megapulse Ii Shortwave Diathermy Unit And Moist Hot Packs On Tissue Temperature Increase Of The Triceps Surae Muscle Group, Amanda Rose Hawkes

Theses and Dissertations

Context: Clinicians use a number of superficial and deep heating modalities, including pulsed shortwave diathermy (PSWD) and moist hot packs, in the clinical setting. Recently, a continuous diathermy unit called ReBound was introduced into the clinical setting. Its effectiveness as a heating modality is unknown. Objective: To compare the effects of PSWD, moist hot packs and the ReBound unit on tissue temperature in the triceps surae muscle. Design: A 3 x 27 factorial cross-over design with repeated measures. Setting: University research laboratory. Subjects: Twelve healthy college-aged volunteers (4 men, 8 women; age = 22.2 ± 2.25; calf subcutaneous fat thickness …

Intramuscular Temperature Responses Of The Vastus Lateralis And Semitendinosus During Squatting And Stretching With Whole Body Vibration, Joshua Gant Allen

Theses and Dissertations

This study was a randomized control trial. The purpose of this study was threefold: 1) to determine if intramuscular temperature (IMt) increases in the semitendinosus (ST) are similar to the vastus lateralis (VL) during standard WBV static squatting; 2) to determine if changes in intramuscular temperature of the hamstrings is different from a standard static semi-squat when undergoing WBV in a static stretching position; and 3) to determine if shorter overall durations as is typically used for stretching protocols (i.e. 5 repetitions of 30s each), will result in IMt increases. Twelve subjects (all males), with tight hamstrings completed this study …

The Relationship Between Source Of Self-Esteem And Body Composition In College Women, Breckann Faun Moncur

Theses and Dissertations

Purpose: The purpose of the study was to determine the relationship between achievement self-esteem, self acceptance self-esteem and body composition in college women. Methods: One-hundred and fifty eight college women were recruited to participate in the study. Participants were healthy, between the age of 18 and 25 yrs, not taking medication that would alter metabolism, and able to participate in physical activity without restriction. As part of the study the participants filled out the Worth Index, which measured level of self-acceptance and achievement self-esteem. The questionnaire included four subscales: basic human worth, performance factor, personal security and appearance. Body composition …

A Comparison Of The Effectiveness Of Two Free Throw Shooting Methods, Andrew J. May

Theses and Dissertations

The purpose of this study was to compare the effectiveness of two free throw shooting methods, the Ed Palubinskas Method (PM) and the Free Shoot Method (FSM), and their ability to improve free throw shooting accuracy. The experimental group, using the PM, and the control group, using the FSM, shot the same amount of free throws over a 13 week period. Subjects were 33 male intermediate basketball students at Brigham Young University. Subjects in both groups shot 26 free throws twice a week. Subjects were tested once every other week by shooting and recording the amount made out of nine …