Sports Sciences Commons^™

Does Footfall Pattern In Forefoot Runners Change Over A Prolonged Run?, Carl W. Jewell

Masters Theses

There has been much debate on the benefits of a forefoot versus rearfoot strike pattern in distance running in terms of performance and injury prevalence. Shock attenuation occurs more prominently in soft tissues at impact in forefoot runners compared to the passive skeletal loading in rearfoot runners. Recent studies indicate that a forefoot strike pattern may not be maintainable over long distance efforts. Therefore, this study tested the hypothesis that habitual forefoot runners could not maintain their strike pattern throughout a prolonged, intensive run.

Fourteen forefoot runners ran to voluntary exhaustion on an instrumented force treadmill (average run duration: 15.4±2.2 …

Kinetic Asymmetries During Submaximal And Maximal Speed Running, Devon H. Frayne

Masters Theses

An important issue for sports scientists, coaches and athletes is an understanding of the factors within a running stride that can enhance or limit maximal running speed. Previous research has identified many sprint-related parameters as potential kinetic limiters of maximal Center of Mass velocity (Chapman and Caldwell, 1983b; Weyand et al., 2001). Bilateral asymmetry is present for many of these parameters during running; however the degree to which such asymmetries change as running speed increases is unknown. It was hypothesized that asymmetries in key sprinting parameters would be larger at maximal speed than all other tested speeds. Kinematics and kinetics …

Stride Length-Speed Relationship During Body Weight Supported Running, Carmen Chona

UNLV Theses, Dissertations, Professional Papers, and Capstones

The purpose of this study was to determine if body weight support influences the stride length-speed relationship. Additionally, the purpose was to determine if impact characteristics of running are influenced by body weight support and speed. Subjects (n=10; 6 female, 4 male) volunteered to participate in this study. All subjects were injury free and were comfortable running on a treadmill for 30 minutes. Subjects ran on a lower body positive (LBPP, Alter-G, G-Trainer) treadmill for 4 conditions of body weight (100, 40, 30 and 20% of body weight) and 4 running speeds (100, 110, 120 and 130% of the preferred …

Thermoregulatory Responses Of Runners Following A Warm-Weather Road Race, Luke N. Belval

University Scholar Projects

Purpose: To quantify the skin temperature changes following intense exercise in warm-weather. Methods: Anterior thermal images and gastrointestinal temperature (TGI) from 20 male runners (mean±SD; 73.5 ± 10.9 kg) participating in a 11.2 km road race were collected before and immediately after the race. Wet-bulb globe temperature (WBGT) and wind speed were recorded at the finish line. Infrared thermal images were divided into 11 distinct regions, superior torso (ST), inferior torso (IT), face (F), right forearm (RF), left forearm (LF), right upper arm (RUA), left upper arm (LUA), right thigh (RT), left thigh (LT), right lower leg (RLL) and left …

Improving Running Performance Using Non-Running Tasks, Darien Lewis

Honors College

For decades researchers and runners have endeavored to improve endurance running performance. Recent evidence suggests that adding resistance training to a running program can improve running performance. Our purpose was to determine if 6wks of resistance exercise via negative eccentrically-induced work (RENEW), an exercise that increases muscle size, strength, and stiffness, could serve as an effective “non-running” modality for improving running performance. Recreational runners were assigned to a: RENEW (n=7), plyometric (PLYO, n=7), or control (CON, n=7) group. RENEW trained on an eccentric ergometer (3x/wk, 10-30min, 54-66% of peak heart rate) while the PLYO performed …

Understanding Ultramarathoners: Identifying Markers Of Success In Ultras Through An Objective Survey Of Ultramarathoners, Renee A. Cabalka Mrs.

Senior Honors Theses

An ultramarathon (ultra) is defined as a race longer in time or distance than a marathon. Studies have been done to identify factors, which contribute to successful completion of other ultra endurance events. The purpose of this study was to determine factors that contribute to the successful completion of an ultramarathon by collecting data via an objective survey. The subjects of this survey were participants in the 2013 Mountain Masochist Trail Race (MMTR) 50 miler. The survey included factors such as gender, age, height, weight, body mass index (BMI), training age, and ultra experience. The survey data was collected and …

Runner Identity And Sponsorship: Evaluating The Rock ‘N’ Roll Marathon, Nancy L. Lough, Jennifer Pharr, Jason O. Owen

Environmental & Occupational Health Faculty Publications

The economic value of participation sport has been reported to eclipse spectator sport significantly. However, scholars have acknowledged the relative lack of research on this important segment of the sport market. The purpose of this study was to analyze the relationship between runner identity and race sponsor effectiveness. Surveys were sent to participants in the Las Vegas Rock ‘n’ Roll Marathon. The survey was constructed to measure runner identity, and sponsor effectiveness as interpreted through rates of recognition, recall and purchase intention. Runners were divided into three groups based on their runner identity score. Of the predictive variables, only runner …

Influence Of Age And Sex On Pacing During Sprint, Olympic, Half-Ironman And Ironman Triathlons. Part B, Sam Shi Xuan Wu, Jeremiah J. Peiffer, Jeanick Brisswalter, Wing Y. Lau, Kazunori Nosaka, Christopher Abbiss

Research outputs 2014 to 2021

The aim of this study was to investigate the influence of biological sex and age on the pacing strategies adopted by non-drafting top triathletes during the cycle and run disciplines of a Sprint, Olympic, half-Ironman and Ironman triathlon. Split times of the top 20% non-elite males (n=468) and females (n=146) were determined using official race transponders and a video capture system for pre-determined sections of the cycle and run disciplines of four triathlon distances. Indices of pacing were calculated to compare between sexes and age-groups. Results of this study indicated that different pacing strategies were adopted between athletes of different …

Iron Status And The Acute Post-Exercise Hepcidin Response In Athletes, Peter Peeling, Marc Sim, Claire E. Badenhorst, Brian Dawson, Andrew D. Govus, Chris R. Abbiss, Dorine W. Swinkels, Debbie Trinder

Research outputs 2014 to 2021

This study explored the relationship between serum ferritin and hepcidin in athletes. Baseline serum ferritin levels of 54 athletes from the control trial of five investigations conducted in our laboratory were considered; athletes were grouped according to values 100 mg/L (SF>100). Data pooling resulted in each athlete completing one of five running sessions: (1) 8x3 min at 85% vVO2peak; (2) 5x4 min at 90% vVO2peak; (3) 90 min continuous at 75% vVO2peak; (4) 40 min continuous at 75% vVO 2peak; (5) 40 min continuous at 65% vVO2peak. Athletes from each running session were represented amongst all four groups; hence, …

Is There A Relationship Between Hip Structure, Hip Muscle Strength, And Lower Extremity Frontal Plane Kinematics During Treadmill Running?, Michael William Robinson Baggaley

Theses and Dissertations--Kinesiology and Health Promotion

INTRODUCTION: Excessive hip adduction (HADD) has been associated with a number of lower extremity overuse injuries, and it has been suggested that it may be the result of reduced strength of the hip abduction musculature. Hip structure has been postulated to influence both hip abduction (HABD) strength and HADD. The purpose of this study was to investigate the relationship between hip structure, HABD strength, and frontal plane kinematics during running. METHODS: Peak isometric HABD strength, lower extremity kinematics, femoral neck-shaft angle (NSA), and pelvis width-femur length (pw-fl) ratio were recorded for 25 female subjects. Pearson correlations (P < .05) were performed between variables. RESULTS: A fair relationship was observed between femoral NSA and HABD strength (r = …