Sports Sciences Commons^™

Relationship Of Force Variables To Vertical Jumps Performance, Hugo A. De Paula Santana

Electronic Theses and Dissertations

The isometric mid-thigh pull (IMTP) has been cited often in the scientific literature; however, there is still a lack of agreement as to the ideal body position used during this test, and how body position impacts the relationship between IMTP performance and dynamic performance. Thus, one aim of this dissertation was to compare two different IMTP positions and correlate the kinetic outputs from each position to vertical jump (VJ) performance. Another purpose of this dissertation was analyze which method of data normalization for IMTP force variables best correlates to squat jump (SJ) and countermovement jump (CMJ) performance.

In the first …

An Epidemiological Look At Injuries Among High School Athletes Participating In A Variety Of Sports For Both Sexes, Emily H. Wills

Undergraduate Honors Theses

Physical activity is part of a healthy lifestyle, but participating in athletic activities like team sports can lead to injury. This study was designed to find the differences in types of high school sports injuries and how frequently these injuries occur among different sports and between males and females. A survey was given to members of the football, boys’ basketball, girls’ basketball, baseball, softball, and volleyball teams of a central Appalachian high school. The highest rate of injury was found in girls’ basketball at 86.7%, followed by football at 85.2%, boys’ basketball at 70.6%, softball and volleyball each at 69.2%, …

Stretching The Spines Of Gymnasts: A Review, William A. Sands, Jeni R. Mcneal, Gabriella Penitente, Steven Ross Murray, Lawrence Nassar, Monèm Jemni, Satoshi Mizuguchi, Michael H. Stone

ETSU Faculty Works

Gymnastics is noted for involving highly specialized strength, power, agility and flexibility. Flexibility is perhaps the single greatest discriminator of gymnastics from other sports. The extreme ranges of motion achieved by gymnasts require long periods of training, often occupying more than a decade. Gymnasts also start training at an early age (particularly female gymnasts), and the effect of gymnastics training on these young athletes is poorly understood. One of the concerns of many gymnastics professionals is the training of the spine in hyperextension—the ubiquitous ‘arch’ seen in many gymnastics positions and movements. Training in spine hyperextension usually begins in early …

Analysis Of Changes In Muscle Architecture And Explosive Ability In Ncaa Division I Volleyball Players, Caleb D. Bazyler, Jacob R. Goodin, Conrad Rapp, Mark Disanto, Frank Smith, Michael H. Stone

ETSU Faculty Works

Abstract available in the 10th Annual Coaches and Sport Science College .

Application Of Principal Components Analysis In Kinetics Study For Isometric Squat, Junshi Liu, Caleb D. Bazyler, Christopher B. Taber, Tony Pustina, Satoshi Mizuguchi

ETSU Faculty Works

Abstract available in the 10th Annual Coaches and Sport Science College .

The Relationship Between Pass Completion Percentage And Perceived Player Workload In Ncaa Division I Women's Soccer, Alexa L. Passingham

Undergraduate Honors Theses

In an attempt to demonstrate the interconnecting nature of the pillars of sport (Hacker, 2000) this thesis explores the relationship between physical, psychological and technical variables. Five National Collegiate Athletic Association (NCAA) Division I Women’s Soccer players were analyzed in four conference matches. The athlete's rate of perceived exertion (RPE) values were correlated to pass completion percentages (PC%) to investigate the potential effect that psychological satisfaction or dissatisfaction of technical performance has on perceived exertion ratings. PlayerLoad^TM (PL) values, gathered through the utilization of a Catapult Minimax S4 GPS device (miniMax-10 Hz, Catapult Innovations, Melbourne, Australia), were used as …

Countermovement Jump Performance Changes Over The Course Of Collegiate Basketball Pre-Season Associated With Block Periodization Model Of Strength And Conditioning Program, Nobuhisa Yoshida, Caleb D. Bazyler, Takahiro Unebasami, Stephen Wells, Zachary Whitman, Danielle Lee, Mallory Stellhorn, Kimitake Sato, Michael H. Stone

ETSU Faculty Works

No abstract provided.

An Investigation Of The Relationship Between A Static Jump Protocol And Squat Strength: A Potential Protocol For Collegiate Strength And Explosive Athlete Monitoring, Cody Haun

Electronic Theses and Dissertations

The purpose of this study was to examine the relationship between estimated absolute and relative squat strength and a static jump protocol with potential to provide desirable training adaptation data to practitioners in the field of collegiate strength and conditioning. Forty-one young (20.80 ± 2.44 years), healthy volunteers reported estimated back squat 1RM’s based on the most recent training block and completed a static jump protocol. Males (n=19, est. 1RM 141.29 ± 32.02kg) and female (n=22, est. 1RM 71.56 ± 19.64kg) jump data revealed large to very large correlations between squat strength, mean jump heights of jumps and other calculated …

The Impact Of Training Loads On In-Match Soccer Performance Variables: A Position-Based Case Report, Garett Bingham

Electronic Theses and Dissertations

It is critical to maintain multiple fitness characteristics during the soccer season through the use of training, but also to ensure that the training loads do not hinder subsequent match performance. The purpose of this thesis is to investigate the impact of the training load on key physical performance variables in the subsequent match. Five Division I female soccer players were analyzed across six weeks of training and matches. Training loads in the forms of odometer, high intensity odometer, estimated odometer and sRPE were accumulated at time points from one to five days prior to a match. The accumulated training …

The Relationships Of Physiological And Strength Variables To Run Performances, Jana Hollins

Electronic Theses and Dissertations

Monitoring progress of athletes is an essential component of the training process. Collegiate distance running coaches often use field tests to assess progress because of a lack of time and resources to do laboratory testing. The purpose of this dissertation was to examine the relationships between physiological and strength variables measured in a laboratory and field testing measures in collegiate distance runners. Collegiate distance runners completed a series of tests in the Sport Science laboratory at East Tennessee State University to obtain physiological and strength parameters, such as V̇ O2max and vertical jump height. The athletes then completed one of …

The Acute Effects Of Ballistic And Non-Ballistic Concentric-Only Half-Squats On Squat Jump Performance, Timothy J. Suchomel

Electronic Theses and Dissertations

The purposes of this dissertation were to examine bilateral asymmetry as a factor of postactivation potentiation, examine and compare the acute effects of ballistic and non-ballistic concentric-only half-squats on squat jump performance, and compare the potentiation and temporal profiles of strong and weak subjects following potentiation protocols that included ballistic and non-ballistic concentric-only half-squats. The following are major findings of the dissertation. Squat jump performance may be acutely enhanced following ballistic concentriconly half-squats; however the changes in performance do not appear to be related to bilateral symmetry. Ballistic concentric-only half-squats acutely improve various squat jump performance variables at various time …

Analysis Of Countermovement Vertical Jump Force-Time Curve Phase Characteristics In Athletes, Christopher J. Sole

Electronic Theses and Dissertations

The purposes of this dissertation were to examine the phase characteristics of the countermovement jump force-time curve between athletes based on jumping ability, examine the influence of maximal muscular strength on the countermovement jump force-time curve phase characteristics of athletes, and to examine the behavior of the countermovement jump force-time curve phase characteristics over the course of a training process in athletes of varying strength levels. The following are the major findings of these dissertations. The analysis of athletes by jumping ability suggested that proficient jumpers are associated with greater relative phase magnitude and phase impulse throughout the phases contained …

Relationship Between Concentric Velocity At Varying Intensity In The Back Squat Using Wireless Inertia Sensor, Kevin M. Carroll

Electronic Theses and Dissertations

The purpose of this study was to determine the relationship between the Minimal Velocity Threshold (MVT) of 1RM and repetitions until failure testing conditions using the back squat exercise. Fourteen injury-free males with experience in the back squat volunteered to perform a 1RM and a submaximal (70% 1RM) repetitions until failure test, each during different testing sessions. Mean Concentric Velocity (MCV) was collected using a wireless inertia-measuring device. The last successful repetition in either condition was considered the MVT. A very small relationship between 1RM and repetitions until failure MVT was found (r=-0.135). There were no significant differences …

Comparison Of External Kinetic And Kinematic Variables Between High Barbell Back Squats And Low Barbell Back Squats Across A Range Of Loads, Jacob Goodin

Electronic Theses and Dissertations

This study compared peak force, peak power, peak velocity, impulse, work, and vertical displacement between the high bar back squat (HBBS) and low bar back squat (LBBS). Six trained males performed each using 20, 30, 40, 50, 60, 70, 80, and 90% of their recent training 1 repetition maximum. Dual force plates recorded force-time curve characteristics of ground reaction forces and four potentiometers tracked vertical and horizontal barbell displacement. Repeated–measures analysis of variance revealed a significant main effect for load (p<0.01) across all variables, but no significant effects for condition or interaction. The HBBS generated higher peak force in loads 20%–80%, higher peak power in loads 20%–60% and 80%–90%, higher peak velocity at every load, and greater vertical displacement at every load. The LBBS generated a larger impulse at loads 30%-90% and the HBBS generated more work at loads 20%, 40%, and 60%–90%.

Stability Of Isometric Strength Asymmetry And Its Relationship To Sprint And Change-Of-Direction Performance Asymmetry In Division-I Collegiate Athletes, Benjamin H. Gleason

Electronic Theses and Dissertations

The purpose of this dissertation was to evaluate the stability of strength asymmetry over a long-term period (1 year) and investigate the relationship of strength asymmetry to field test performance asymmetry in NCAA division-1 athletes. Isometric mid-thigh pull (IMTP) peak force asymmetry, ground contact time and finish time asymmetries on 10m sprint and 505 agility test performances were also observed. The impact of strength was also investigated in these studies to determine its effect on the magnitude of asymmetry.

In the second study, peak force asymmetry over a one-year period was observed to be a rather volatile quality, with ranges …

Utilizing Weightlifting For Cycling Performance, Nicholas J. Fiolo, Christopher B. Taber, Caleb D. Bazyler, Cody T. Haun, Robert Duncan, Aaron M. Thomas, Michael W. Ramsey, Michael H. Stone

ETSU Faculty Works

Abstract available in the 9th Annual Coaches and Sport Science College.

Using The Minimax Accelerometer To Quantify The Demands Of Preseason Training In Ncaa Volleyball: A Descriptive Case-Study Study, Christopher J. Sole, Nobuhisa Yoshida, Bradley A. Alban, Caleb D. Bazyler, Satoshi Mizuguchi

ETSU Faculty Works

Abstract available in the 9th Annual Coaches and Sport Science College.

Is A 20 Kg Load Sufficient To Simulate Fatigue In Squat Jumps?, Chris A. Bailey, T. Mcinnis, K. Sato, B. Johnston, Z. Sha, Michael H. Stone

ETSU Faculty Works

Abstract available in the Annual Coaches and Sport Science College.

Analysis Of Changes In Strength, Explosiveness, And Agility Performance Over An Ncaa Division I Tennis Career: A Case Study, Caleb D. Bazyler, Jacob R. Goodin, George Beckham, H. Santana, M. Swartz, Ashley A. Kavanaugh

ETSU Faculty Works

Abstract available in the 9th Annual Coaches and Sport Science College .

Insulin Resistance And Muscle Insulin Receptor Substrate-1 Serine Hyperphosphorylation, Charles A. Stuart, Mary E. A. Howell, Brian M. Cartwright, Melanie P. Mccurry, Michelle L. Lee, Michael W. Ramsey, Michael H. Stone

ETSU Faculty Works

Insulin resistance in metabolic syndrome subjects is profound in spite of muscle insulin receptor and insulin-responsive glucose transporter (GLUT4) expression being nearly normal. Insulin receptor tyrosine kinase phosphorylation of insulin receptor substrate-1 (IRS-1) at Tyr896 is a necessary step in insulin stimulation of translocation of GLUT4 to the cell surface. Serine phosphorylation of IRS-1 by some kinases diminishes insulin action in mice. We evaluated the phosphorylation status of muscle IRS-1 in 33 subjects with the metabolic syndrome and seventeen lean controls. Each underwent euglycemic insulin clamps and a thigh muscle biopsy before and after 8 weeks of either strength or …

An Exploratory Study On The Use Of Concentric Velocities In The Back Squat As A Monitoring Tool, Kevin M. Carroll, Josh D. Christovich, Caleb D. Bazyler, Nicholas J. Fiolo, George K. Beckham, Kimitake Sato

ETSU Faculty Works

Abstract available in the 9th Annual Coaches and Sport Science College .

The Effects Of Vertically-Oriented Resistance Training On Golf Swing Performance Variables, Austin R. Driggers

Electronic Theses and Dissertations

The purpose of this study was to examine the effects of vertically-oriented resistance training on golf driving performance. Ten Division-I collegiate golfers completed 2 resistance training sessions per week for 10 weeks during the fall tournament season. Pre- and posttraining assessments of strength-power and golf performance were compared. To assess strength-power, jump height, peak force, and peak power (PP) were measured from static and countermovement (CMJ) vertical jumps; peak force and rate of force development from 0-250 ms were measured from an isometric mid-thigh pull. Golf performance was assessed in terms of ball launch speed (BS), spin rate, carry yardage …

Coach And Athlete Perceptions Of An Athlete Monitoring And Strength And Conditioning Program, Jacob P. Reed

Electronic Theses and Dissertations

Purpose: The purpose of this investigation was to assess athlete perceptions of an athlete monitoring program throughout an academic year and coach perceptions throughout a competitive season. The secondary purpose was to develop a questionnaire designed to assess coach and athlete perceptions of the monitoring program. Methods: Athletes and coaches participating in the athlete monitoring program at East Tennessee State University’s (ETSU) Sport Performance Enhancement Consortium (SPEC) were invited to participate. Reliability for the coach and athlete questionnaires and principle components analysis (PCA) of the athlete questionnaire was completed after initial development of the questionnaire (11 questions for athletes and …

Physical And Performance Characteristics May Influence Successful Completion Of Military Tasks On The Sandhurst Competition, Keith A. Leiting

Electronic Theses and Dissertations

Identification and development of physical characteristics that lead to efficient performance of military skills or tasks has been a consistently difficult task for the United States military for decades. The literature suggests certain physical characteristics may be more important, although this information is conflicting. Furthermore, the military physical fitness training program that is intended to prepare soldiers for combat is commonly evaluated with the Army Physical Fitness Test (PFT), a test that is more suited for evaluating health and wellness rather than task-specific fitness. All of this testing and training of soldiers focuses on the individual soldiers and their abilities …

Lower Body Strength And Power Characteristics Influencing Change Of Direction And Straight-Line Sprinting Performance In Division I Soccer Players: An Exploratory Study, Chieh-Ying Chiang

Electronic Theses and Dissertations

The purpose of this dissertation was to investigate the influence of lower body strength characteristics on change of direction (COD) performance in NCAA Division I soccer athletes. Specifically, this dissertation served to examine: 1) whether the lower body strength and power were related to COD performance, 2) whether stronger athletes had superior COD performance than weaker athletes, 3) whether the force production asymmetry and strength dominant (SD) associated with COD performance, and 4) weather sex differences existed in kinetic variables during the stand phase of cutting.

The major findings of this dissertation include: 1) strength and power characteristics were moderately …

Physical And Technical Demands Of Women’S Collegiate Soccer, Ryan Alexander

Electronic Theses and Dissertations

The purpose of this dissertation was to explore the physical and technical demands of the women’s college soccer game through a case study approach. With advancements in technology, motion analysis has become commonplace in most professional environments. However, the literature on amateur soccer is quite scarce and warrants more attention. The aims of this dissertation were: 1) to describe the physical demands of each position for a women’s college soccer player as they relate to total distance covered, efforts, and distance covered in high-speed velocity bands, 2) explore the variation in physical performance during a competitive season, and 3) compare …

Leg Dynamic Strength Predictors Of A Pre-Planned Change Of Direction Task In Ncaa Division 1 Soccer Players, Chieh-Ying Chiang, Christopher A. Bailey, Christohper J. Sole, Timothy J. Suchomel, Kimitake Sato, Michael H. Stone

ETSU Faculty Works

The purpose of this investigation was to evaluate the relationships between two types of vertical jumps and change of direction (COD) test in collegiate soccer players (n=24). 5-5 COD test was utilized to measure soccer athletes’ COD ability. 3m acceleration (3mAcc), Total time (TT) and Partial time (PT) were measured by two sets of timing gates. Countermovement jump (CMJ) and static jump (SJ) with 2 different loading conditionings (0kg and 20kg) were employed to evaluate athletes’ leg dynamic strength. Strong statistically significant relationships were found between COD test variables (r =0.71 to 0.90), and between vertical jump variables with PT …

Changes In Peak Acceleration In The Snatch Across Multiple - Attempts In Training: A Case Study, George K. Beckham, Kimitake Sato, Timothy J. Suchomel, William A. Sands, Michael H. Stone

ETSU Faculty Works

Accelerometers are devices that have been recently used to assess the performance of weightlifters in training. This case study used vertical acceleration data to assess multiple snatch attempts in a single lifter during a training session. The lifter exhibited variability in a number of measures, including peak acceleration and peak velocity. The measures calculated from the acceleration-time data did not show consistent trends between made and missed lifts. More work is needed identify variables of interest for snatch performance.

Longitudinal Monitoring Of Countermovement Jump Mechanical Variables: A Preliminary Investigation, Christopher J. Sole, Satoshi Mizuguchi, Timothy J. Suchomel, William A. Sands, Michael H. Stone

ETSU Faculty Works

The purpose of this study was to examine the influence of accumulated volume load on countermovement jump (CMJ) mechanical variables. Eight athletes underwent weekly CMJ testing using a force plate. Statistical changes were observed in certain CMJ variables over the observation period. Jump height (0.42±0.05 m) and allometrically scaled peak power (88.86±7.49 W·kg-0.67) exhibited multiple statistical changes. These changes appeared to exhibit a delayed effect in response to accumulated volume load. Specifically, following several weeks of large accumulated volume loads these variables declined. In addition subsequently decreasing accumulated volume loads resulted in an increase in both variables. The findings of …

Differences In Semg Between Normal Squats And Accentuated Eccentric Loaded Squats In Competitive Collegiate Weightlifters, Christopher Macdonalds, Kimitake Sato, Christian Carter, Hugh Lamont, William Sands, Michael H. Stone, Michael Israetel, Jeremy A. Gentles, Jason Cholewa, John Garner, Michael Ramsey, Guy Hornsby

ETSU Faculty Works

The purpose of the present work was to compare the effect of accentuated eccentric loaded (AEL) squats to normally loaded (NOR) squats on surface measured muscle activation (sEMG) in competitive weightlifters. Eight experienced, competitive weightlifters (six males, two females) completed both an AEL and NOR squat session (seven days apart), comprised of nine sets of squats, and was identical to their normal scheduled training. sEMG data from the vastus medialis (VM), vastus lateralis (VL), and biceps femoris (BF) was collected (at 1000Hz) during the entirety of the concentric (CON) phases of the AEL and NOR sessions. RMANOVAs (set x session-type) …