Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Kinesiology (6)
- Life Sciences (6)
- Social and Behavioral Sciences (6)
- Sports Studies (5)
- Medical Specialties (4)
-
- Rehabilitation and Therapy (4)
- Biomechanics (3)
- Neurology (3)
- Physiotherapy (3)
- Anatomy (2)
- Business (2)
- Diseases (2)
- Education (2)
- Exercise Science (2)
- Musculoskeletal Diseases (2)
- Musculoskeletal System (2)
- Nervous System (2)
- Nervous System Diseases (2)
- African American Studies (1)
- African History (1)
- Anthropology (1)
- Arts and Humanities (1)
- Business Administration, Management, and Operations (1)
- Civic and Community Engagement (1)
- Civil Rights and Discrimination (1)
- Communication (1)
- Cultural History (1)
- Curriculum and Instruction (1)
- Institution
- Keyword
-
- Power (5)
- Tactical Load Carriage (5)
- Exercise and Sports Biomechanics (4)
- Concussion (3)
- Kinetics (3)
-
- Strength (3)
- Tactical Health and Physical Conditioning (3)
- Adult (2)
- Arduous field training exercise (2)
- Article (2)
- Athlete (2)
- Australian army soldier (2)
- Carriage (2)
- Comparative study (2)
- Conditioned (2)
- Conditioning (2)
- Contact sport (2)
- Coordination (2)
- Cortisol (2)
- Countermovement jump (2)
- Creatine kinase (2)
- Fatigue (2)
- Fitness (2)
- GPS (2)
- Human (2)
- Injury (2)
- Kinematics (2)
- Load (2)
- Load carriages (2)
- Male (2)
- Publication
- File Type
Articles 1 - 30 of 42
Full-Text Articles in Sports Sciences
Reconditioning Post Injury: Part 1 Musculoskeletal Injuries: Mechanisms And Causes, Rob Marc Orr
Reconditioning Post Injury: Part 1 Musculoskeletal Injuries: Mechanisms And Causes, Rob Marc Orr
Rob Marc Orr
No abstract provided.
The Operational Load Carriage Context Of The Australian Army Soldier, Rob Orr, R. Pope, V. Johnston, J. Coyle
The Operational Load Carriage Context Of The Australian Army Soldier, Rob Orr, R. Pope, V. Johnston, J. Coyle
Rob Marc Orr
Military soldiers are required to carry loads as part of their occupation. These loads have led to injuries and even mortalities on the battlefield (Orr et al., 2011). Recent evidence suggests that the absolute loads carried by Australian Army soldiers are increasing (Orr, et al., 2010). The intent of this study was to investigate the loads can ied by Australian Regular Army soldiers on operations and the contexts in which these loads are carried.
Metabolic Fitness As A Predictor Of Injury Risk In Conditioned Military Trainees Undertaking An Arduous Field Training Exercise, N. Meigh, Michael Steele, Rob Orr
Metabolic Fitness As A Predictor Of Injury Risk In Conditioned Military Trainees Undertaking An Arduous Field Training Exercise, N. Meigh, Michael Steele, Rob Orr
Rob Marc Orr
Musculoskeletal injuries reduce the ability for military forces to train new personnel. Metabolic fitness has been used to predict injury risk in new Australian Army trainees. The purpose of the present study was to examine the validity of using metabolic fitness to determine injury risk in conditioned military trainees completing an arduous field training exercise.
The Operational Load Carriage Context Of The Australian Army Soldier, Rob Orr, R. Pope, V. Johnston, J. Coyle
The Operational Load Carriage Context Of The Australian Army Soldier, Rob Orr, R. Pope, V. Johnston, J. Coyle
Rob Marc Orr
Military soldiers are required to carry loads as part of their occupation. These loads have led to injuries and even mortalities on the battlefield (Orr et al., 2011). Recent evidence suggests that the absolute loads carried by Australian Army soldiers are increasing (Orr, et al., 2010). The intent of this study was to investigate the loads can ied by Australian Regular Army soldiers on operations and the contexts in which these loads are carried.
Metabolic Fitness As A Predictor Of Injury Risk In Conditioned Military Trainees Undertaking An Arduous Field Training Exercise, N. Meigh, Michael Steele, Rob Orr
Metabolic Fitness As A Predictor Of Injury Risk In Conditioned Military Trainees Undertaking An Arduous Field Training Exercise, N. Meigh, Michael Steele, Rob Orr
Rob Marc Orr
Musculoskeletal injuries reduce the ability for military forces to train new personnel. Metabolic fitness has been used to predict injury risk in new Australian Army trainees. The purpose of the present study was to examine the validity of using metabolic fitness to determine injury risk in conditioned military trainees completing an arduous field training exercise.
Load Carriage For The Tactical Operator: Impacts And Conditioning - A Review, Rob Marc Orr
Load Carriage For The Tactical Operator: Impacts And Conditioning - A Review, Rob Marc Orr
Rob Marc Orr
Tactical operators are required to carry loads as part of their occupations. Carriage of these loads have been associated with causing physical injuries to the carrier and impairing their ability to perform occupational tasks. One potential means of negating these risks associated with load carriage tasks is through physically conditioning the carrier. Through use of the Frequency, Intensity, Time and Type (F.I.T.T.) formula this review explored the literature to determine the optimal conditioning stimulus to enhance the resilience of tactical operators required to perform load carriage tasks. It was determined that a conditioning stimulus of one load carriage session every …
Load Carriage: Impacts And Conditioning, Rob Orr
Biochemical And Endocrine Responses To Impact And Collision During Elite Rugby League Match Play, Christopher Mclellan, Dale Lovell, Gregory Gass
Biochemical And Endocrine Responses To Impact And Collision During Elite Rugby League Match Play, Christopher Mclellan, Dale Lovell, Gregory Gass
Chris McLellan
The purpose of this study was to investigate the relationship between the prematch and short-term postmatch biochemical and endocrine responses to the intensity, number, and distribution of impacts associated with collisions during elite Rugby League match play. Seventeen elite male Rugby League players each provided blood and saliva samples 24 hours prematch, 30 minutes prematch, 30 minutes postmatch, and then at 24-hour intervals for a period of 5 days postmatch to determine plasma creatine kinase concentration ([CK]) and salivary cortisol concentration ([sCort]). The intensity, number, and distribution of impact forces experienced by players during match play were recorded using portable …
The Role Of Rate Of Force Development On Vertical Jump Performance, Christopher Mclellan, Dale Lovell, Gregory Gass
The Role Of Rate Of Force Development On Vertical Jump Performance, Christopher Mclellan, Dale Lovell, Gregory Gass
Chris McLellan
The purpose of this study was to examine a) the relationship between rate of force development (RFD) and vertical jump (VJ) performance during a counter movement jump (CMJ), and b) the reliability of RFD recorded during the CMJ and squat jump (SJ) forms of the VJ. Twenty-three physically active men aged 23 ± 3.9 years participated in the study. Subjects completed 3 unloaded CMJ and 3 unloaded SJ in random order on a force plate. The RFD was measured during CMJ and SJ movements with vertical jump displacement (VJD) measured simultaneously during the CMJ only. Subjects incorporated arm swing to …
Markers Of Postmatch Fatigue In Professional Rugby League Players, Christ Mclellan, Dale Lovell, Gregory Gass
Markers Of Postmatch Fatigue In Professional Rugby League Players, Christ Mclellan, Dale Lovell, Gregory Gass
Chris McLellan
The aim of the present study was to identify neuromuscular, biochemical, and endocrine markers of fatigue after Rugby League match play. Seventeen elite Rugby League players were monitored for a single match. Peak rate of force development (PRFD), peak power (PP), and peak force (PF) were measured during a countermovement jump (CMJ) on a force plate pre and postmatch play. Saliva and blood samples were collected 24 hours prematch, 30 minutes prematch, 30 minutes postmatch, and then at 24-hour intervals for a period of 120 hours to determine plasma creatine kinase concentration ([CK]) and salivary cortisol concentration ([sCort]). There were …
Performance Analysis Of Elite Rugby League Match Play Using Global Positioning Systems, Christopher Mclellan, Dale Lovell, Gregory Gass
Performance Analysis Of Elite Rugby League Match Play Using Global Positioning Systems, Christopher Mclellan, Dale Lovell, Gregory Gass
Chris McLellan
The aim of this study was (a) to examine the physiological demands of competitive Rugby League match play using portable Global Positioning Systems (GPSs) to monitor players' movement patterns and heart rate (HR) and (b) examine positional comparisons to determine if players' physiological requirements are influenced by their playing position during Rugby League match play. Twenty-two elite male Rugby League players were monitored during 5 regular season competition matches using portable GPS software. There was no difference in the total distance traveled between backs (5,573 ± 1,128 m) and forwards (4,982 ± 1,185 m) during match play. Backs and forwards …
Does Upper Body Strength And Power Influence Upper Body Wingate Performance In Men And Women?, D. Lovell, D. Mason, E. Delphinus, A. Eagles, S. Shewring, Christopher Mclellan
Does Upper Body Strength And Power Influence Upper Body Wingate Performance In Men And Women?, D. Lovell, D. Mason, E. Delphinus, A. Eagles, S. Shewring, Christopher Mclellan
Chris McLellan
The aim of this study was to determine the influence of muscular strength and power on upper body Wingate performance in men and women. Muscular strength (1 repetition maximum bench press), muscular power (bench throws) and upper body anaerobic performance (Wingate Anaerobic Test (WAnT)) was assessed in 24 men and 16 women. Men had signifi cantly ( P < 0.001) higher absolute and relative peak and mean power and blood lactate concentration during the WAnT compared to their female counterparts. Men also produced signifi cantly ( P < 0.001) higher strength and absolute and relative peak and mean power during the bench …
Do Compression Garments Enhance The Active Recovery Process After High-Intensity Running?, Dale Lovell, Dale Mason, Elias Delphinus, Christopher Mclellan
Do Compression Garments Enhance The Active Recovery Process After High-Intensity Running?, Dale Lovell, Dale Mason, Elias Delphinus, Christopher Mclellan
Chris McLellan
This study examined the effect of wearing waist-to-ankle compression garments (CGs) on active recovery after moderate- and high-intensity submaximal treadmill running. Twenty-five male semiprofessional rugby league players performed two 30-minute treadmill runs comprising of six 5-minute stages at 6 km.hˉ¹, 10 km.hˉ¹, approximately 85% VO2max, 6 km.hˉ¹ as a recovery stage followed by approximately 85% VO2max and 6 km.hˉ¹ wearing either CGs or regular running shorts in a randomized counterbalanced order with each person acting as his own control. All stages were followed by 30 seconds of rest during which a blood sample was collected to determine blood pH and …
A Comparison Of Asynchronous And Synchronous Arm Cranking During The Wingate Test, Dale Lovell, Dale Mason, Elias Delphinus, Christopher Mclellan
A Comparison Of Asynchronous And Synchronous Arm Cranking During The Wingate Test, Dale Lovell, Dale Mason, Elias Delphinus, Christopher Mclellan
Chris McLellan
Purpose: The aim of this study was to compare asynchronous (ASY) arm cranking (cranks at 180° relative to each other) with synchronous (SYN) arm cranking (parallel crank setting) during the 30 s Wingate anaerobic test.
Methods: Thirty-two physically active men (aged 22.1 ± 2.4 y) completed two Wingate tests (one ASY and one SYN) separated by 4 d in a randomized counterbalanced order. The Wingate tests were completed on a modified electromagnetically braked cycle ergometer. Performance measures assessed during the two tests include peak power, mean power, minimum power, time to peak power, rate to fatigue and maximum …
Soldier Load Carriage: An Investigation Into The Load Carriage Conditioning Practices Of The Australian Regular Army, Rob Orr, Rodney Pope, Venerina Johnston, Julia Coyle
Soldier Load Carriage: An Investigation Into The Load Carriage Conditioning Practices Of The Australian Regular Army, Rob Orr, Rodney Pope, Venerina Johnston, Julia Coyle
Rob Marc Orr
No abstract provided.
The Australian Army Load Carriage Context: A Challenge For Defence Capability, Rob Orr
The Australian Army Load Carriage Context: A Challenge For Defence Capability, Rob Orr
Rob Marc Orr
No abstract provided.
Effects Of Two Contrast Training Programs On Jump Performance In Rugby Union Players During A Competition Phase, Christos K. Argus, Nicholas D. Gill, Justin W. L. Keogh, Michael R. Mcguigan, Will G. Hopkins
Effects Of Two Contrast Training Programs On Jump Performance In Rugby Union Players During A Competition Phase, Christos K. Argus, Nicholas D. Gill, Justin W. L. Keogh, Michael R. Mcguigan, Will G. Hopkins
Nicholas J Gill
Purpose: There is little literature comparing contrast training programs typically performed by team-sport athletes within a competitive phase. We compared the effects of two contrast training programs on a range of measures in high-level rugby union players during the competition season.Methods: The programs consisted of a higher volume-load (strength-power) or lower volume-load (speed-power) resistance training; each included a tapering of loading (higher force early in the week, higher velocity later in the week) and was performed twice a week for 4 wk. Eighteen players were assessed for peak power during a bodyweight countermovement jump (BWCMJ), bodyweight squat jump (BWSJ), 50 …
Body Composition, Physical Fitness, Functional Performance, Quality Of Life, And Fatigue Benefits Of Exercise For Prostate Cancer Patients: A Systematic Review, Justin W. L. Keogh, Roderick D. Macleod
Body Composition, Physical Fitness, Functional Performance, Quality Of Life, And Fatigue Benefits Of Exercise For Prostate Cancer Patients: A Systematic Review, Justin W. L. Keogh, Roderick D. Macleod
Justin Keogh
Context: Prostate cancer patients, especially those on androgen deprivation therapy (ADT), experience many symptoms that make it difficult to maintain their independence and quality of life. Because ADT acts by means of reducing testosterone production, exercise may offset many of the ADT side effects and those of the cancer itself.Objectives: This systematic review of the literature evaluates whether exercise could reduce symptoms and improve quality of life for prostate cancer patients.Methods: Using relevant databases and key words, 12 training studies were found meeting the inclusion and exclusion criteria.Results: Grade A level evidence was observed for the benefits of exercise in …
Interrelationships Between Strength, Anthropometrics, And Strongmen Performance In Novice Strongman Athletes, Paul W. Winwood, Justin W. L. Keogh, Nigel K. Harris
Interrelationships Between Strength, Anthropometrics, And Strongmen Performance In Novice Strongman Athletes, Paul W. Winwood, Justin W. L. Keogh, Nigel K. Harris
Justin Keogh
Winwood, PW, Keogh, JWL, Harris, NK, and Weaver, LM. Interrelationships between strength, anthropometrics, and strongman performance in novice strongman athletes. J Strength Cond Res 26(2): 513–522, 2012—The sport of strongman is relatively new; hence, specific research investigating this sport is currently very limited. The purpose of this study was to determine the relationships between anthropometric dimensions and maximal isoinertial strength to strongman performance in novice strongman athletes. Twenty-three semiprofessional rugby union players with considerable resistance training and some strongman training experience (age 22.0 ± 2.4 years, weight 102.6 ± 10.8 kg, height 184.6 ± 6.5 cm) were assessed for anthropometry …
Evidence For Biomechanics And Motor Learning Research Improving Golf Performance, Justin W. L. Keogh, Patricia A. Hume
Evidence For Biomechanics And Motor Learning Research Improving Golf Performance, Justin W. L. Keogh, Patricia A. Hume
Justin Keogh
The aim of this review was to determine how the findings of biomechanics and motor control/learning research may be used to improve golf performance. To be eligible, the biomechanics and motor learning studies had to use direct (ball displacement and shot accuracy) or indirect (clubhead velocity and clubface angle) golf performance outcome measures. Biomechanical studies suggested that reducing the radius path of the hands during the downswing, increasing wrist torque and/or range of motion, delaying wrist motion to late in the downswing, increasing downswing amplitude, improving sequential acceleration of body parts, improving weight transfer, and utilising X-factor stretch and physical …
Development Of A Clinical Multiple-Lunge Test To Predict Falls In Older Adults, Ruth Wagenaar, Justin W. Keogh, Denise Taylor
Development Of A Clinical Multiple-Lunge Test To Predict Falls In Older Adults, Ruth Wagenaar, Justin W. Keogh, Denise Taylor
Justin Keogh
Objective: To develop a new Multiple-Lunge Test to distinguish between fallers and nonfallers in community-dwelling older adults.Design: A cross-sectional design was used to establish the sensitivity and specificity of the test to predict faller status based on retrospective self-reported fall history. Setting: Local retirement villages.Participants: Community-dwelling older adults (N 130; mean age SD, 77 7y) with (n 40) and without (n 90) a history of falls.Interventions: The Multiple-Lunge Test required individuals to lunge forward to a step length determined as 60% of their leg length, and return to start, for 5 consecutive repetitions. Interday and intraday test-retest reliability of the …
Variability Of Pacing In Marathon Distance Running, Thomas A. Haney Jr.
Variability Of Pacing In Marathon Distance Running, Thomas A. Haney Jr.
Thomas M. Haney
The purposes of this study were to describe variability of pacing during a marathon and to determine if there is a relationship between variability of pacing and marathon performance. A total of 301 race profiles that contained personal global positioning system (GPS) from the Rock „n‟ Roll Las Vegas (Race 1) and San Diego (Race 2) marathons were downloaded (http://connect.garmin.com) and analyzed. Each marathon finish time was placed into one of three finish time bins: Bin 1: 2.5 – 3.9 hrs, Bin 2: 4.0 – 4.6 hrs, Bin 3: 4.7 – 7.2. The coefficient of variation of velocity (Velcov) was …
Do Tournaments Have Incentive Effects?, Ronald Ehrenberg, Michael Bognanno
Do Tournaments Have Incentive Effects?, Ronald Ehrenberg, Michael Bognanno
Ronald G. Ehrenberg
Much attention has been devoted to studying models of tournaments or situations in which an individual's payment depends only on his or her output or rank relative to that of other competitors. Academic interest derives from the fact that under certain sets of assumptions, tournaments have desirable normative properties because of the incentive structures they provide. Our paper uses nonexperimental data to test whether tournaments actually elicit effort responses. We focus on professional golf tournaments because information on the incentive structure (prize distribution) and measures of individual output (players' scores) are both available. We find strong support for the proposition …
A Biomechanical Comparison Of The Traditional Squat, Powerlifting Squat, And Box Squat, Paul Swinton, Ray Lloyd, Justin Keogh, Ioannis Agouris, Arthur Stewart
A Biomechanical Comparison Of The Traditional Squat, Powerlifting Squat, And Box Squat, Paul Swinton, Ray Lloyd, Justin Keogh, Ioannis Agouris, Arthur Stewart
Justin Keogh
Swinton, PA, Lloyd, R, Keogh, JWL, Agouris, I, and Stewart, AD. A biomechanical comparison of the traditional squat, powerlifting squat, and box squat. J Strength Cond Res 26(7): 1805–1816, 2012. The purpose of this study was to compare the biomechanics of the traditional squat with 2 popular exercise variations commonly referred to as the powerlifting squat and box squat. Twelve male powerlifters performed the exercises with 30, 50, and 70% of their measured 1 repetition maximum (1RM), with instruction to lift the loads as fast as possible. Inverse dynamics and spatial tracking of the external resistance were used to quantify …
Sources Of Variability In Iso-Inertial Jump Assessments, Kristie-Lee Taylor, John Cronin, Nicholas Gill, Dale Chapman, Jeremy Sheppard
Sources Of Variability In Iso-Inertial Jump Assessments, Kristie-Lee Taylor, John Cronin, Nicholas Gill, Dale Chapman, Jeremy Sheppard
Nicholas J Gill
Purpose: This investigation aimed to quantify the typical variation for kinetic and kinematic variables measured during loaded jump squats. Methods: Thirteen professional athletes performed six maximal effort countermovement jumps on fouroccasions. Testing occurred over 2 d, twice per day (8 AM and 2 PM) separated by 7 d, with the same procedures replicated on each occasion. Jump height, peak power (PP), relative peak power (RPP), mean power (MP), peak velocity (PV), peak force (PF), mean force (MF), and peak rate of force development (RFD) measurements were obtained from a linear optical encoder attached to a 40 kg barbell. Results: A …
Comparing Thigh Muscle Cross-Sectional Area And Squat Strength Among National Class Olympic Weightlifters, Power Lifters, And Bodybuilders, James J. Di Naso, Brian L. Pritschet, John D. Emmett, Jill W. Owen, Jeffrey Willardson, Travis W. Beck, Jason M. Defreitas, Fabio E. Fontana
Comparing Thigh Muscle Cross-Sectional Area And Squat Strength Among National Class Olympic Weightlifters, Power Lifters, And Bodybuilders, James J. Di Naso, Brian L. Pritschet, John D. Emmett, Jill W. Owen, Jeffrey Willardson, Travis W. Beck, Jason M. Defreitas, Fabio E. Fontana
Jeffrey Willardson
Few studies have compared anthropometric characteristics among national class athletes from different resistance training disciplines, such as Olympic Weightlifting (OL), Power Lifting (PL), and Bodybuilding (BB). Objective: The purpose of the current study was to determine if significant differences exist in the relationship between thigh muscle cross-sectional area and back squat strength among national class athletes from the sports of OL, PL, and BB. Methods: Fifteen national class athletes were assessed for back squat strength, mid-thigh circumference, and mid-thigh skinfold from which total thigh cross-sectional was estimated. A series of One-Way ANOVAs and Pearson Product Moment Correlations were used to …
Effects Of Lift Velocity On Muscle Activation During Leg Extension, Stephen C. Glass
Effects Of Lift Velocity On Muscle Activation During Leg Extension, Stephen C. Glass
Stephen C Glass
Abstract: It is not known if manipulating velocity within a prescribed resistance training mode will improve muscle activation. Muscle activations of the Rectus Femoris (RF), Vastus Lateralis (VL), Vastus Medialis (VM) and Bicep Femoris (BF) were examined during a leg extension exercise at 3 different velocities on 15 subjects (10men, 5 female, Age = 21.5 ± 1.8 yrs, Height = 171.2 ± 12.5 cm, Mass = 75.5 ± 16.3 kg). Trials of 1 set of 10 repetitions at 60% of 1RM, were performed at 15, 30 and 60º/s. Bipolar surface electrodes were placed over the BF, RF, VL, and VM. …
Exploring A Short-Wavelength Sensitive Cone Mechanism To Brightness And Discomfort Glare, David Glabe
Exploring A Short-Wavelength Sensitive Cone Mechanism To Brightness And Discomfort Glare, David Glabe
David K Glabe
Yellow lenses have long been reported to alter visual perception, including subjective impressions of brightness and discomfort glare. To date, no consensus has been reached regarding the physiological mechanism behind this altered perception, although recent research suggests a possible short-wavelength sensitive cone (S-cone) mechanism. An experiment was conducted to test the hypothesis that S-cones are responsible for the perceived increase in brightness and decrease in discomfort glare perception when viewing through yellow lenses. Thirty participants were asked to use neutral density filters to match perception of brightness and discomfort glare through colored filters and with no filters in low and …
The Royal Military College Physical Conditioning Optimisation Review: A Four Year Project To Improve Physical Health And Fitness While Reducing Injuries, Robin Orr
Rob Marc Orr
This session presents a unique insight into the Physical Conditioning Optimisation Review; a four year project to reduce musculoskeletal injuries at the Royal Military College. It will highlight the benefits and potential pitfalls of an injury surveillance program and the importance of identifying cultural and contextual factors that influence risks and risk controls. Lessons learnt and subsequent actions taken by the review will be explored and the impact of dedicated managerial support and effective leadership discussed.
Transforming The Nigerian Nation Through Science, Technology And Mathematics Education, Jerome O. Okafor
Transforming The Nigerian Nation Through Science, Technology And Mathematics Education, Jerome O. Okafor
Prof. Jerome O Okafor
No abstract provided.