Sports Sciences Commons^™

The Effects Of Incline And Resistance On Metabolic Cost And Muscle Activation In Elliptical Exercise, Megan K. Alfi

Cal Poly Humboldt theses and projects

Elliptical trainers are machines that were designed to mimic the motion of running while reducing the ground reaction forces and joint loading on the lower body. As a result, endurance runners commonly use it as a cross-training modality. The purpose of this study was to investigate the effects of ramp incline and resistance in elliptical exercise on metabolic cost and lower limb muscle activation patterns. A secondary purpose was to compare the metabolic cost and muscle activation patterns of elliptical exercise to running. Methods: Gross metabolic cost and muscle activation for eight muscles of the leg were measured during elliptical …

The Effect Of Stretching The Gastrocnemius On Electromechanical Delay And Decreased Muscle Power Production, Kolyse E. Wagstaff

Honors College Theses

Previous studies in the field of biomechanics have determined that statically stretching muscles before explosive athletic events decreases muscle power production during performance. However, current research does not explain why muscle power production is lessened due to static stretching. Electromechanical delay (EMD) is the delay between muscle stimulation and force, and the purpose of this research is to determine if the decrease in muscle force production is due to a lengthened EMD of the muscle, potentially caused by static stretching. To test this, participants jumped on force plates and jump power produced by the gastrocnemius was calculated, with stretching and …

Examining The Relationship Between Exercise Induced Fatigue And Postural Stability Among Geriatric Patients With Vestibular Disorders, Alexis Christine King

University of the Pacific Theses and Dissertations

Purpose: This study examined: (1) the relationship between exercise induced fatigue and postural balance amongst geriatric patients with vestibular disorders. (2) Assessed the duration for postural stability to return to baseline measurements upon induced fatigue.

Methods: A controlled pre-post test experimental design method was used during this study. This study incorporated a quantitative analysis to explore the relationship between exercise induced fatigue and postural balance with a sample of 24 subjects. The subjects were randomly assigned to either an experimental or control group. Baseline postural stability measurements were conducted prior to all subject testing and were accounted for again once …

Using The Medication Cabinet To Predict Fall Risk In Elderly Adults, Jessica Lopez

University of the Pacific Theses and Dissertations

Background: In the United States, 30-60% of older adults fall each year; 10-20% of these falls result in injury, hospitalization, or even death. Better prevention of falls in this population may be facilitated by broader identification of risk factors. The use of statins has emerged as a potential risk factor, but the data provide conflicted results.

Purpose: To examine the relationship between statin use and falls among community-dwelling older adults.

Methods: We evaluated the patient registry of a Level 1 trauma center. All patients aged > 50 years who were admitted for falls in 2015 were included (n=615). Many of these …

Transitioning To Minimal Footwear: A Systematic Review Of Methods And Future Clinical Recommendations, Joe Warne, Allison H. Gruber

Articles

Recent interest in barefoot running has led to the development of minimalist running shoes that are popular in distance runners. A careful transition to these shoes has been suggested and examined in the literature. However, no guidelines based on systematic evidence have been presented.

The Influence Of Match Outcome On Running Performance In Elite Gaelic Football, Shane Mangan, Shane Malone, Martin Ryan, Jason Mcgahan, Cian O'Neill, Con Burns, Joe Warne, Denise Martin, Kieran Collins

Articles

Introduction: Match outcome has been linked to running performance in many sports; however, the association has not yet been examined in Gaelic football. Methods: GPS technologies (4-Hz, VX Sport, Lower Hutt, New Zealand) were used with 5 elite Gaelic football teams over a period of 5 years (2012–2016), amounting to 95 matches. In total, 780 full match data sets were collected. Game movements were divided into total distance and high-speed distance (≥17 km h−1). Match outcomes were divided into big losses (≥6 points), small losses (≤5points), draws, small wins (≤5 points) and big wins (≥6 points). Results: Team (P …

A Six Stage Operational Framework For Individualising Injury Risk Management In Sport, Mark Roe, Shane Malone, Catherine Blake, Kieran Collins, Conor Gissane, Fionn Buttner, John C. Murphy, Eamonn Delahunt

Articles

Managing injury risk is important for maximising athlete availability and performance. Although athletes are inherently predisposed to musculoskeletal injuries by participating in sports, etiology models have illustrated how susceptibility is influenced by repeat interactions between the athlete (i.e. intrinsic factors) and environmental stimuli (i.e. extrinsic factors). Such models also reveal that the likelihood of an injury emerging across time is related to the interconnectedness of multiple factors cumulating in a pattern of either positive (i.e. increased fitness) or negative adaptation (i.e. injury).

Effects Of Carbohydrate Mouth Rinse And Caffeine On High-Intensity Interval Running In A Fed State, Simon Devenney, Shane Mangan, Marcus Shortall, Kieran Collins

Articles

The current study aims to identify if mouth rinsing with a 6% carbohydrate mouth-rinse (CMR) solution and mouth rinsing and ingestion of caffeine (CMR+CAFF) can affect exercise performance during steady-state (SS) running and high-intensity intervals (HIIT) in comparison with a 0% control solution (PLA) when in a fed state. Eight recreationally trained males completed 3 trials (CMR, CMR+CAFF, and PLA) of 45 min SS running and an HIIT protocol (90% peak treadmill velocity) until fatigue in a double blinded, repeated-measures study. Participants ingested a capsule of either CAFF or PLA before and after SS. Participants received a 25-mL bolus of …

Effect Of Game Design, Goal Type, And Player Numbers On The Physiological And Physical Demands Of Hurling-Specific Small-Sided Games, Shane Malone, Kieran Collins

Articles

The current study examined the effect that game design modification, goal type, and player numbers on the running performance and physiological demands of small-sided hurling games (SSG). Forty-eight hurling players (age, 25.5 ± 3.2 years; height, 178.9 ± 3.2 cm; body mass, 78.5 ± 4.5 kg) performed 4 types of SSG (possession [P], normal play [NP], regular goals [RG] and small goals [SG]) in 4-a-side, 5-a-side, and 6-a-side formats. Heart rate (Polar Electro Oy) and global positioning system technology (VX Sport, 4-Hz, Lower Hutt) were used to analyze the physical and physiological differences between SSG. Total distance (m), high-speed running …

Are Small-Sided Games An Effective Training Methodology For Improving Fitness In Hurling Players? A Comparative Study Of Training Methodologies, Shane Malone, Brian Hughes, Kieran Collins

Articles

The current investigation compared the effects of specific small-sided games training versus generic continuous aerobic training on team sport related exercise performances. Forty-eight hurling players (age: 25 ± 6.4 years; height: 180.2 ± 20.4 cm; mass: 80.5 ± 3.2 kg; V·O2max" role="presentation" style="display: inline; line-height: normal; word-spacing: normal; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">V⋅O2maxV·O2max: 58.78 ± 3.05 ml·kg·min⁻¹) completed either traditional continuous aerobic training (n = 24) or team sport-specific small-sided game training (n = 24), consisting …

Monitoring Player Fitness, Fatigue Status And Running Performance During An In-Season Training Camp In Elite Gaelic Football, Shane Malone, Brian Hughes, Mark Roe, Kieran Collins, Martin Buchheit

Articles

Objectives: To examine selected perceptual and physiological measures to monitor fitness, fatigue and running performance during an in-season training camp in elite Gaelic football. Methods: Twenty-two elite Gaelic football players were monitored for training load, perceived ratings of wellness, heart rate variability (HRV; LnSD1), heart rate recovery (HRR), exercise heart rate (HRex), lower limb muscular power (CMJ) and global positioning system (GPS) variables. The Yo-Yo intermittent recovery test level 1 (Yo-YoIR1) was assessed pre and post the training camp. With specific small-sided games (SSG) used as a measure of running performance. Results: During the camp, HRex decreased (−12.2%), HRR increased …

The Running Performance Profile Of Elite Gaelic Football Match-Play, Shane Malone, Barry Solan, Kieran Collins

Articles

The current study examined (a) the match running performance of Gaelic football and (b) the decrement in match running performance with respect to position. Global positioning satellite system technologies (4-Hz; VX Sport) were used with 3 elite intercounty teams across 3 full seasons with 250 full game data sets collected. Game movements were classified according to game actions and distance covered across speed zone thresholds (total distance [TD], high-speed running distance [HSRD; ≥17 km·h], sprint distance [SD; ≥22 km·h]; accelerations [n]; peak speed [km·h]). The influence of running performance in each quarter on the subsequent quarter was analyzed across all …

The Relationship Between Technical Performance Indicators And Running Performance In Elite Gaelic Football, Shane Mangan, Martin Ryan, Simon Devenney, Aidan Shovlin, Jason Mcgahan, Shane Malone, Cian O'Neill, Con Burns, Kieran Collins

Articles

The aim of the current study was to assess whether technical performance relates to positional running demands of elite Gaelic football players. Over a period of three years (2014–2016), four elite Gaelic football teams were monitored using GPS technologies. Four hundred and thirty-two individual player samples were collected from 52 competitive matches. Video analysis software was used to code technical performance indicators in all games. Pearson’s correlations were performed between all technical variables and total distance (m) and high-speed distance (≥17 km h−1). Total ball in play time had small to medium effects (r = .233 to .390, p …

A Contemporary Multi-Modal Mechanical Approach To Training Monitoring In Elite Professional Soccer, Adam Owen, Leo Djaoui, Matthew Newton, Shane Malone, Bruno Mendes

Articles

Objectives: Understanding movements and mechanical demands of elite soccer players during training and competitive stressors is important for the support provision of player performance. Continued appreciation to quantify and monitor training load (TL) is apparent, however reporting multi-modal approaches in-line with competitive match-play demands remain limited. The investigation aimed to highlight a multimodal training monitoring method and its relationship to match-play. Subjects: 29 elite European soccer players participated were assessed (26.7 ± 4.07 years, height 183.4 ± 5.87 cm, body mass 78.4 ± 8.03 kg, 57.55 ± 5.32 ml.kg⁻¹.min⁻¹ and body composition 54.12 ± 13.65 mm) with daily …

Goal Orientation, Motivational Climate, And Exercise As Predictors Of Eating Disorder Risk Factors Among College Students, Carly Wahl

College of Graduate Studies: Theses & Dissertations

College is a transition period in a young adult’s life in which eating disorder symptomology is especially prevalent. Additionally, motivation-based factors such as goal orientation and motivational climate can influence these eating disorder-like behaviors, especially in a physical activity setting. The present study aimed to examine how goal orientation, motivational climate, and exercise could be used to predict a college students’ eating disorder symptomology. Participants included 276 college-aged males and females from a university in the southeastern United States. These participants had experience using the university recreation activity center and were recruited from a required healthful living course. Each participant …

Reliability And Validity Of The Gwalk For Use In Postural Control, Megan Mormile

College of Graduate Studies: Theses & Dissertations

Introduction: Clinical examinations are highly subjective when compared to the more sensitive and robust measures observed with force platform assessment. Currently, few methods exist to quantify objective postural control deficits in an easier and more accessible way for clinicians. Purpose: The purpose of this study was to examine the reliability and validity of a wireless inertial sensing device, the BTS GWalk, during postural control assessment. Methods: Fifty-six participants (27 male, 22 ± 1.9 years, 29 female, 21 ± 0.9 years) performed three trials each of quiet standing with eyes open (EO) and eyes closed (EC) on a force …

The Effect Of Repetitive Head Impacts On Postural Control Over The Course Of A Single Season, Katelyn E. Grimes

College of Graduate Studies: Theses & Dissertations

INTRODUCTION: Recently neurocognitive dysfunction has been linked to poor postural control in concussed athletes. While the detrimental effect of repetitive head impacts on cognitive function have been shown to mirror the effects of concussive injury, very little research has investigated the physical consequences of repetitive head impacts. PURPOSE: To observe the effects of RHI on postural control, both static and dynamic, in NCAA Division I athletes over the course of a single season. METHODS: 9 NCAA Division I football athletes (CON) were recruited from a single university as the experimental group, as well as 9 NCAA Division I baseball players …

The Reliability Of The Navicular Drop Test And Its Transferability To Dynamic Movement, Joshua Krispin

College of Graduate Studies: Theses & Dissertations

Background: Navicular drop can be defined as the distance the navicular tuberosity moves from a standing weight bearing to a standing neutral position, as the subtalar joint moves from a relaxed position to a neutral position. Navicular drop is an important measurement for clinicians used to describe foot function, pronation, and excessive movement seen in several pathologies. Objective: The purpose of this study is to see if navicular drop is influenced by mode or speed of locomotion, if it is will there be other influences such as the forefoot and heel soft tissue, and will those factors influence those measures. …

The Effects Of Beetroot Juice On Vo2max And Blood Pressure During Submaximal Exercise, Jose M. Perez

College of Graduate Studies: Theses & Dissertations

Supplementation with beetroot juice (BR) has been shown to reduce blood pressure (BP) at rest and improve several performance parameters during submaximal and maximal exercise. BR effects on BP during submaximal exercise have not been investigated. Furthermore, the effects of BR on VO₂max are inconclusive. The purpose of this study was to investigate the effects of BR on VO₂max and BP during submaximal exercise. 20 healthy, recreationally trained volunteers (age 21.8±2.35 years, weight 75.10±10.62 kg, height 177.4±6.39 cm) participated in this study, which had a double-blind placebo controlled randomized crossover design. Participants began supplementation with either …

The Effects Of Chronic L-Carnitine And Carbohydrate Supplementation On Body Composition And Athletic Performance In Female Endurance Athletes., Melissa Eryn Stack

College of Graduate Studies: Theses & Dissertations

Purpose. The purpose of this study was to examine the effects of chronic L-carnitine and carbohydrate supplementation on body composition, perceived exertion, and athletic performance in recreationally-trained female endurance runners. Methods. On three separate occasions, twenty-one days a part, seven recreationally-trained female endurance runners performed a timed progressive treadmill test to exhaustion as well as a body composition assessment using the Bod PodÒ. Participants were randomly assigned to one of two groups – L-carnitine (LC) or L-carnitine plus carbohydrates (LC + CHO). The LC group consumed 2 g of L-carnitine L-tartrate and the LC + CHO group consumed 2 g …