Kinesiology Commons^™

Self Myofascial Release: Effects On Hamstring Range Of Motion And Torque, Dillion F. Evans

Honors Theses

Research has indicated that static stretching may reduce force production capabilities. This has led many practitioners to exchange static stretching for alternative methods of increasing range of motion (ROM) in warm-ups. Despite having little research to support its use, self myofascial release—foam rolling—has been suggested as a viable alternative (Macdonald et al, 2013). The objective of this study was to determine how self myofascial release (SMR) of the hamstring muscle group affects ROM and torque production capabilities of the hamstring muscle group. Ten subjects (age 26.5 6.5 years, mass 74.412.1 kg, height 1738 cm) were recruited. A within subjects randomized, …

Physiological Responses At The Critical Heart Rate During Treadmill Running, Haley Bergstrom

Department of Nutrition and Health Sciences: Dissertations, Theses, and Student Research

The purposes of this study were to: 1) determine if the critical heart rate (CHR) model for cycle ergometry can be applied to treadmill running; and 2) examine the times to exhaustion (T_lim) as well as the VO₂, ratings of perceived exertion (RPE), electromyographic amplitude (EMG AMP) and mean power frequency (MPF) responses during constant heart rate (HR) runs at CHR-5 b·min^-1 (CHR-5), CHR, and CHR+5 b·min^-1 (CHR+5). Thirteen runners performed an incremental treadmill test to exhaustion. On separate days, 4 constant velocity runs to exhaustion were performed. The total number of heart beats …

Biomechanical Analysis Of Gait Kinetics Resulting From Use Of A Vacuum Socket On A Transtibial Prosthesis, Maria De Lourdes Ramos Gonzalez

Honors College Theses

The technology and design of lower limb prosthetics have evolved greatly since their introduction. The current study proposed to compare the effects of a conventional pin socket attachment and a vacuum socket attachment for a transtibial amputee. Whereas traditional measurements of gait utilize force plates and camera systems, this study made use of a small tri-axial load cell located at the base of the socket to measure the forces and moments exerted during a regular gait cycle. The hypothesis tested stated that a vacuum pump socket attachment, when compared to a non-vacuum (pin) socket, will have a significant effect on …

The Acute Effects Of Different Blood Flow Restriction Settings On Blood Lactate, Electromyography And Leg Strength During Bilateral Knee Extensions, Guillermo Eduardo Perez

Theses and Dissertations - UTB/UTPA

The current protocols being used for Blood Flow Restriction (BFR) exercise did not examine the effects of different Initial Restrictive Pressures (pressure applied to limb by cuff prior to inflation, IRP) during design. There are several research articles highlighting the importance of IRP and how it can create variability in results. Therefore it is necessary to evaluate the current BFR protocol against different IRP in order to determine reliability. PURPOSE: The purpose of this study was to examine the acute effects of different blood flow restriction setting on 1) the level of blood lactate production, 2) neuromuscular activation (the changes …

Effects Of An In-Season Resistance Training Program On Lower Extremity Power Output In Collegiate Basketball Players, Kevin Lee King

Graduate Theses and Dissertations

The purpose of this study was to evaluate changes in muscle power performance in a horizontal (forward movement), vertical, and lateral directions in collegiate basketball players due to the presence of an in-season resistance training program (ISRTP). Four basketball teams were recruited for this study. Two women's basketball teams and two men's basketball teams participated with one team in each gender participating in an ISRTP and one team not participating in an ISRTP. Fifty-three collegiate basketball players (Females= 29, Males= 24) were successfully recruited for this project. Subjects were assessed for lower extremity muscle power and muscle strength at pre-season, …

Effects Of Tens On Voluntary Quadriceps Activation And Vertical Ground Reaction Force During Walking In Subjects With Experimental Knee Pain, Seong Jun Son

Theses and Dissertations

Context: Knee pain is a common symptom in knee pathology and is associated with alterations in quadriceps activation and movement patterns. Reducing pain through intervention may help reestablish neuromuscular function. The independent effects of knee pain are difficult to examine and unclear. Objective: To investigate the effects of transcutaneous electrical nerve stimulation (TENS) on quadriceps activation and vertical ground reaction force (VGRF) during walking. Design: Crossover. Setting: Laboratory. Subjects: 15 in the TENS group (10M and 5F, 23.5 ± 2.8 yrs, 70.5 ± 12.5 kg, 178.1 ± 7.4 cm), and 15 in the sham group (10M and 5F, 22.5 ± …

The Effects Of Apoe Knock Out On Skeletal Muscle Regeneration: A Look Into Markers Of Protein Synthesis And Satellite Cell Function, Joshua Eden Ragland

Graduate Theses and Dissertations

ApoE helps regulate serum cholesterol levels by adding in transport of cholesterol into the cells, as well as, to the liver. ApoE knockout mice (ApoE KO) present a model that demonstrates the effects of hypercholesterolemia. Damage to muscle stimulates a complex regenerative response. The effects of high cholesterol on this regenerative response are not known. PURPOSE: To determine if skeletal muscle regeneration is altered in apoE KO mice by measuring protein synthesis regulator IGF-1, Akt, mTOR, and p70S6K, cell cycle regulator cyclin D1, and myogenic regulatory factors myoD and myogenin. METHODS: Female C57/BL6 (WT) and apoE KO were assigned to …

Asymmetric Unilateral Transfemoral Prosthetic Simulator, Tyagi Ramakrishnan

USF Tampa Graduate Theses and Dissertations

amputation, which includes reduced force generation at the knee and ankle, reduced control of the leg, and different mass properties relative to their intact leg. The physical change in the prosthetic leg leads to gait asymmetries that include spatial, temporal, or force differences. This altered gait can lead to an increase in energy consumption and pain due to compensating forces and torques. The asymmetric prosthesis demonstrated in this research aims to find a balance between the different types of asymmetries to provide a gait that is more symmetric and to make it overall easier for an amputee to walk.

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Salivary Alpha-Amylase As An Indicator Of Body Stress Following An Acute Session Of Repetitive Jumping, Shaelee Allen

UNLV Theses, Dissertations, Professional Papers, and Capstones

Determining body stress levels is important when developing training programs for athletes and rehab facilities. Stress levels during exercise are commonly measured using heart rate, oxygen consumption (VO₂), and blood biomarkers. These collection measures involve training on the part of the data collector and the participant, are invasive, and themselves elicit some stress. The purpose of this study is to test whether a 10-min repetitive jumping session will cause a significant increase in salivary alpha-amylase, a potential stress biomarker. This study also looks to determine if a 20-min recovery is enough time for amylase levels to return to …

The Relationship Among School Playground Design And Conditions And Physical Activity Levels In Children, Ipuna Estavillo Black

UNLV Theses, Dissertations, Professional Papers, and Capstones

Almost 20% of children aged 6 to 11 years are obese in the United States, tripling over the last ten years. The rise in childhood obesity challenges nurses in their efforts to improve community health and sustainability. A decrease in physical activity (PA) levels has been associated with an increase in obesity. Schools have been identified as a primary setting to provide children adequate amounts of daily PA, and nurses working in the area of child health promotion can work with schools to provide opportunities for children to increase PA levels. The playground is one environment where children can increase …

The Effects Of A Single Bout Of Self-~Myofascial Release On Flexibility And Maximum Voluntary Contraction, Jonathan Robert Garcia

UNLV Theses, Dissertations, Professional Papers, and Capstones

Purpose: The purpose of this study was to determine the effect of foam rolling on hamstrings flexibility, isometric and isokinetic torque. Participants: Thirteen female participants (N = 13; age: 28.5 + 6.8 years of age; height: 165.5 + 6.7 cm; mass: 64.2 + 8.4 kg) volunteered to participate in the study.

Methods: Hamstring flexibility was assessed using a sit and reach test; muscle strength was assessed by having participants complete a maximal voluntary isometric contraction (MVIC) of the hamstrings and maximal effort isokinetic knee flexion test using an isokinetic dynamometer. Participants completed these tests prior to any intervention (pre-rolling 1), …

The Influence Of Ambulation Speed And Corresponding Mechanical Variables On Articular Cartilage Metabolism, W. Matt Denning

Theses and Dissertations

During ambulation, lower-extremity joint angles and net moments influence knee joint load. It is unclear which mechanical variables most strongly correlate with acute articular cartilage (AC) catabolism in response to ambulation. Purpose: To determine which mechanical variables are most strongly correlated to acute AC catabolism, and to test the acute effect of ambulation speed on AC catabolism, while controlling for load frequency. Methods: 18 able-bodied subjects (9 male, 9 female; age = 23 ± 2 y; mass = 68.3 ± 9.6 kg; height = 1.70 ± 0.08 m) completed three separate ambulation sessions: slow (preferred walking speed), medium (+50% of …

Development Of A System For Analysis Of Muscle Contraction Pattern During Drosophila Melanogaster Crawling Behavior, Mary Catherine Decker

Celebrating Scholarship & Creativity Day (2011-2017)

The aim of this study was to attain footage of the crawling Drosophila larva from 360° angles in order to visualize the pattern of individual muscle contractions. A GAL4-UAS system was used to drive homozygous GCAMP expression, causing the muscles of the Drosophila larva to fluoresce when contracting. A stand was designed in order to place a live, crawling larva in a glass capillary tube under a fluorescent microscope and then rotate the tube completely for 360° video footage. Through the combination of the GCAMP expression and the rotatable stand, video of the individual muscle contraction pattern of a crawling …

Differences Between Men And Women In Percentage Of Body Weight Supported During Push-Up Exercise, Constance M. Mier, Tal Amasay, Steven Capehart, Heather Garner

International Journal of Exercise Science

International Journal of Exercise Science 7(2) : 161-168, 2014. The purpose of this study was to investigate the effects of push-up method (standard vs modified) and gender on percentage of body weight supported. Thirty seven men and women completed five push-ups in the standard (SPU) and modified (MPU) positions, and 5-sec hold (static) in the up (elbow extension) and down (elbow flexion) positions. Vertical ground reaction forces (expressed as load relative to body weight) were measured using force platforms. From a video-captured image, a computer software distance tool measured vertical range of motion (ROM) achieved in the down position expressed …

The Critical Power Concept And Bench Press: Modeling 1rm And Repetitions To Failure, R Hugh Morton, Matthew D. Redstone, Daniel J. Laing

International Journal of Exercise Science

International Journal of Exercise Science 7(2) : 152-160, 2014. Introduction: We demonstrate application of the 3-parameter critical power (CP) model derived for cycling and running, to performance at bench press exercise. We apply the model to both performance of a single repetition maximum (1RM) and multiple repetitions (reps) to failure at different sub-maximal weights. Methods: Sixteen weight-trained young adult male participants each performed a modified YMCA 1RM test and four sets of fixed cadence reps to failure at different sub-maximal weights. The CP model equation takes the form: n = ALC/(m – CL) + ALC/(CL – Lmax,), where n is …

Racial Comparisons In Police Officer Bench Press Strength Over 12.5 Years, Robert W. Boyce, Tyler K. Willett, Glenn R. Jones, Edward L. Boone

International Journal of Exercise Science

International Journal of Exercise Science 7(2) : 140-151, 2014. Strength, when considering gender and race, provides a basis for training, hiring, and retention for police officers. The purpose of this study is to identify muscular strength differences among racial groups from initial-recruit to in-service tests. Strength variables included bench press, bench press/lean mass and bench press/body mass. Scores were retrieved for the 1990 to 1995 recruit classes and were paired to the 2006 in-service fitness log. Sample included 309 officers: 30 females (13 black, 17 white) and 279 males (41 black, 238 white). Mean age of recruit was 24.6 ± …

Manuscript Has Been Retracted, Michael Smith, Eric Trexler, Allan Sommer, Brooke Starkoff, Steven Devor

International Journal of Exercise Science

International Journal of Exercise Science 7(2) : 128-139, 2014. Manuscript has been retracted.

Development Of A Prediction Equation For Vertical Power In Masters Level Basketball Athletes, Jordan M. Glenn, Jennifer Vincenzo, Michelle Gray, Ashley Binns

International Journal of Exercise Science

International Journal of Exercise Science 7(2) : 119-127, 2014. Performance factors such as power, agility, and speed are important in sport-based competition for older individuals. Prediction models that assess these factors in masters level competitors are limited. The purpose of this study was to examine physical field measures of agility and speed and their ability to predict vertical power (VP) among basketball masters athletes(MA). Thirty-eight competitive MA from a Midwest Senior Olympic basketball tournament performed vertical jump, 20-yard dash (20-D), 40-yard dash (40-D), and T-test (TT) assessments. Regression analysis revealed a significant relationship (p = .002) using TT and …

Factors Associated With Diabetes Risk In South Texas College Students, Jordan W. Stack, Sara E. Mahoney, Christopher M. Hearon

International Journal of Exercise Science

International Journal of Exercise Science 7(2) : 110-118, 2014. South Texas has a high prevalence of diabetes and college students may be particularly at risk. While increased BMI, sedentary activity and depression have been associated with diabetes progression in the general population, it has not been established whether these factors contribute to increased diabetes risk in college students. The purpose of this study was to assess diabetes risk and determine whether depressive symptoms or physical activity patterns are associated with increased diabetes risk in college students. Sixty-nine college students were assessed for diabetes risk using the Finnish Diabetes Risk Score …

The Role Of High School Physical Activity Experience In College Students’ Physical Activity Motivation, Joseph S. Madonia, Anne E. Cox, Melissa L. Zahl

International Journal of Exercise Science

International Journal of Exercise Science 7(2) : 98-109, 2014. This study tested the role of past physical activity mode in predicting physical activity motivation of first year college students. Consistent with self-determination theory, perceived competence and autonomy were expected to mediate the relationships of specific types of physical activity engaged in during high school to autonomous motivation for physical activity in college. College students (N = 124; M_age= 18.42, SD = 0.51) completed an online questionnaire that assessed frequency of engagement in different modes of physical activity during their final year of high school (i.e., competitive sport, …