Medicine and Health Sciences Commons^™

External Kinetics Of The Kettlebell Snatch In Amateur Lifters, James A Ross, Justin W L Keogh, Cameron J Wilson, Christian Lorenzen

Justin Keogh

BACKGROUND:

Kettlebell lifting has gained increased popularity as both a form of resistance training and as a sport, despite the paucity of literature validating its use as a training tool. Kettlebell sport requires participants to complete the kettlebell snatch continuously over prolonged periods of time. Kettlebell sport and weightlifting involve similar exercises, however, their traditional uses suggest they are better suited to training different fitness qualities. This study examined the three-dimensional ground reaction force (GRF) and force applied to the kettlebell over a 6 min kettlebell snatch set in 12 kettlebell-trained males.

METHODS:

During this set, VICON was used to …

The Association Between Fundamental Athletic Movements And Physical Fitness In Elite Junior Australian Footballers, Carl Woods, Ian Mckeown, Justin Keogh, Sam Robertson

Justin Keogh

Advances In Rehabilitation And Assistive Robots For Restoring Limb Function In Persons With Movement Disorders, Fan Gao, Guanglin Li, Huapeng Wu, Qining Wang, Jie Liu, Justin W. L. Keogh

Justin Keogh

People with movement disorders are plagued with debilitating conditions, which significantly degrade their quality of life. Traditional rehabilitation typically involves intensive interaction between patients and therapists. While effective, traditional rehabilitation cannot keep abreast of the increasing patient population primarily attributed to a higher surviving rate after diseases and/or injuries. Furthermore, patients living in the rural areas have fairly limited access to rehabilitation services. In the past two decades, tremendous efforts have been put into developing rehabilitation and assistive robots to facilitate the rehabilitation training while relieving the physical involvement of therapists and/or lowering the related cost. Most notably, the rehabilitation …

Examining Evidence Based Resistance Plus Balance Training In Community-Dwelling Older Adults With Complex Health Care Needs: Trial Protocol For The Muscling Up Against Disability Project., Justin W L Keogh, Tim Henwood, Paul Gardiner, Anthony Tuckett, Brent Hodgkinson, Kevin Rouse

Justin Keogh

Progressive resistance plus balance training (PRBT) has been demonstrated as effective in reducing later life physical disability, falls risk and poor health, even among those with complex health care needs. However, few studies have examined the influence of PRBT on health service utilisation, cognitive wellbeing and training modality acceptance or undertaken a cost benefit analysis. This project will investigate the broad scope benefits of PRBT participation among community-dwelling older Australians receiving Government supported aged care packages for their complex health care needs. Using a modified stepped-wedge design, 248 community-dwelling adults 65 years and older with some level of government support …

Evolution Of Smart Devices And Human Movement Apps: Recommendations For Use In Sports Science Education And Practice, Justin Keogh, Hugo Espinosa, Josie Grigg

Justin Keogh

Many smart phones and tablets possess high-speed cameras. An increasing number of human movement professionals (e.g. personal trainers, athletics coaches, strength and conditioning coaches and physiotherapists) are beginning to use human movement analysis apps with their smart phones/tablets to quantitatively assess their clients' performance and injury risk. however, an understanding of the validity and reliability of those tools is required. this narrative review seeks to list some relevant human movement apps; summaries the validity and reliability of selected apps and to provide recommendations for their use in education and practice.

The Effect Of A Seven-Week Exercise Program On Golf Swing Performance And Musculoskeletal Measures, Mico H. Olivier, Sean A. Horan, Kerrie A. Evans, Justin W. L. Keogh

Justin Keogh

As most golf exercise studies have shown improved golf performance as a result of two or three sessions per week, the present study investigated the effects of a supervised exercise session performed once a week for seven weeks on golf swing variables and musculoskeletal screening measures. Professional Golfers Association of Australia International Golf Institute student golfers (n = 43) with a mean ± standard deviation handicap of 8.6 ± 8.3 participated in the study. Each golfer performed 10 musculoskeletal tests and a standardised 60-shot golf performance test (TrackMan, Vedbaek, Denmark) on separate days before and after the seven-week program. Significant …

Practical Applications Of Biomechanical Principles In Resistance Training: The Use Of Bands And Chains, Paul A. Swinton, Justin Keogh, Jason Lake

Justin Keogh

In recent years, it has become popular for athletes and recreational trainers to perform resistance training with the addition of bands and chains. In this paper, we consider the advantages of manipulating an exercise to match the resistance provided with the force capabilities of the lifter, which generally change throughout the movement. We explain that bands and chains can be used to manipulate a variety of exercises that have the potential to enhance performance in sport and in many daily tasks. Whilst there are many similaritiesbetween the use of bands and chains for resistance training, we note that there are …

Perceived Benefits, Motives, And Barriers To Aqua-Based Exercise Among Older Adults With And Without Osteoarthritis, Alison Fisken, Justin Keogh, Deborah L. Waters, Wayne Hing

Justin Keogh

This study aimed to (a) identify factors that motivate older adults to participate in aqua-based exercise; (b) identify potential barriers; and (c) compare perceptions between older adults with and without osteoarthritis (OA). Fifteen adults above 60 years of age participated in one of three focus groups during which they discussed perceived benefits, motives, and barriers to aqua exercise. Pain reduction was considered a major benefit among those with OA, improved health and fitness was a principal benefit for those without OA. All participants felt that the instructor could act as both a motivator and barrier; the most significant barrier was …

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

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

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

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 …

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

Justin Keogh

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 …

A Brief Description Of The Biomechanics And Physiology Of A Strongman Event: The Tire Flip, Justin W.L. Keogh, Amenda L. Payne, Brad B. Anderson, Paul J. Atkins

Justin Keogh

The purpose of this study was to (a) characterize the temporal aspects of a popular strongman event, the tire flip; (b) gain some insight into the temporal factors that could distinguish the slowest and fastest flips; and (c) obtain preliminary data on the physiological stress of this exercise. Five resistance-trained subjects with experience in performing the tire flip gave informed consent to participate in this study. Each subject performed 2 sets of 6 tire flips with a 232-kg tire with 3 minutes of rest between sets. Temporal variables were obtained from video cameras positioned 10 m from the tire, perpendicular …

Strength And Coordination Training Are Both Effective In Reducing The Postural Tremor Amplitude Of Older Adults, Justin W.L. Keogh, Steve Morrison, Rod Barrett

Justin Keogh

The current study investigated the effect of 2 different types of unilateral resistance training on the postural tremor output of 19 neurologically healthy men age 70–80 yr. The strength- (n = 7) and coordination-training (n = 7) groups trained twice a week for 6 wk, performing dumbbell biceps curls, wrist flexions, and wrist extensions, while the control group (n = 5) maintained their normal activities. Changes in index-finger tremor (RMS amplitude, peak, and proportional power) and upper limb muscle coactivation were assessed during 4 postural conditions that were performed separately with the trained and untrained limbs. The 2 training groups …

Digit Force Control In Older Adults: Benefits Of Resistance-Training?, Justin W.L. Keogh

Justin Keogh

This paper seeks to review the effect on digit force control of: 1) the ageing process; and 2) the resistance-training in older adults. Significant age-related decreases in finger-pinch force control were observed in many but not all studies. Those that didn't report age-related differences involved bi-digit finger-pinch tasks requiring the production of constant forces only. This suggests that the age-related decline in force control becomes more pronounced the more challenging the force production task. While three studies reported that resistance-training improved older adults' digit force control capabilities, it is unclear if these improvements would occur in tasks that: 1) require …