Biological Maturity And The Anthropometric Physical And Technical Assessment Of Talent Identified U16 Australian Footballers, Ashley Cripps, Christopher Joyce, Carl Woods, Luke Hopper
Jun 2016
Biological Maturity And The Anthropometric Physical And Technical Assessment Of Talent Identified U16 Australian Footballers, Ashley Cripps, Christopher Joyce, Carl Woods, Luke Hopper
Christopher Joyce
This study compared biological maturation, anthropometric, physical and technical skill measures between talent and non-talent identified junior Australian footballers. Players were recruited from the under 16 Western Australian Football League and classified as talent (state representation; n = 25, 15.7 ± 0.3 y) or non-talent identified (non-state representation; n=25, 15.6 ± 0.4 y). Players completed a battery of anthropometric, physical and technical skill assessments. Maturity was estimated using years from peak height velocity calculations. Binary logistic regression was used to identify the variables demonstrating the strongest association with the main effect of ‘status’. A receiver operating characteristic curve was used …
Investigation Of Genetic Markers In Sub-Elite Australia Rules Football Players, Ysabel Jacob, Ashley Cripps, Tess Evans, Paola Chivers, Christopher Joyce, Ryan Anderton
Jun 2016
Investigation Of Genetic Markers In Sub-Elite Australia Rules Football Players, Ysabel Jacob, Ashley Cripps, Tess Evans, Paola Chivers, Christopher Joyce, Ryan Anderton
Christopher Joyce
Natural genetic variation contributes towards athletic performance in various strength/power and endurance based sports. To date, no studies have explored the genetic predisposition towards skill and athletic performance in Australian Football (AF) players. The present pilot study recruited 30 sub-elite AF players who completed tests of endurance, power and technical skill. Specific polymorphisms in nine genes were screened, and assessed for a possible influence on athletic and skill traits. Statistical analysis using generalised linear models identified a number of polymorphisms predictive of endurance and technical skill. The angiotensin-converting enzyme (ACE), normally responsible for regulation of body fluid …
Coaches’ Perceptions Of Long-Term Potential Are Biased By Maturational Variation, Ashley Cripps, Luke Hopper, Christopher Joyce
Jun 2016
Coaches’ Perceptions Of Long-Term Potential Are Biased By Maturational Variation, Ashley Cripps, Luke Hopper, Christopher Joyce
Christopher Joyce
Talent identification and development programs seek to recognise and promote athletes with long-term potential in a particular sport. Coaches involved in these programs are often required to make inclusions or exclusion decisions based on their perceptions of an athlete’s long-term potential. However, biological maturity can influence physical capabilities of adolescent athletes and may bias coaches’ perceptions of long-term potential. This study explored the relationship between coaches’ perceptions of long-term potential and variations in athlete’s biological maturity. Talented adolescent male Australian footballers from nine (n¼264) different teams were recruited to provide basic anthropometric information for estimates of biological maturity. Coaches from …
How Incremented Fatigue Affects Kicking Performance Of Elite Junior Australian Footballers, Christopher Joyce
Apr 2016
How Incremented Fatigue Affects Kicking Performance Of Elite Junior Australian Footballers, Christopher Joyce
Christopher Joyce
Introduction & Aims: Australian football (AF) is a dynamic team invasion sport that requires players to possess unique physical and technical performance attributes. However, as the speed of the game increases and the levels of high intensity running increase, so does the effects of fatigue. Research has investigated the effect of fatigue on maximal kicking distance kinematics however, it is yet to investigate the effects of fatigue on functional kicking performance (accuracy and speed).
Methods: Twenty-four participants from the 2015 WAFL U18s competition were tested. The valid AF Kicking (AFK) test was completed three times, with the Yo-Yo Intermittent …
The Relationship Between Two Measures Of Physical Capacity And Match Performance In Semi-Professional Australian Rules Football, Toby Edwards, Ben G. Piggott, Paola Chivers, Christopher Joyce
Dec 2015
The Relationship Between Two Measures Of Physical Capacity And Match Performance In Semi-Professional Australian Rules Football, Toby Edwards, Ben G. Piggott, Paola Chivers, Christopher Joyce
Christopher Joyce
No abstract provided.
The Relationship Between Two Measures Of Physical Capacity And Match Performance In Semi-Professional Australian Rules Football, Toby Edwards, Ben G. Piggott, Christopher Joyce, Paola Chivers
Dec 2015
The Relationship Between Two Measures Of Physical Capacity And Match Performance In Semi-Professional Australian Rules Football, Toby Edwards, Ben G. Piggott, Christopher Joyce, Paola Chivers
Christopher Joyce
No abstract provided.
Does Flexibility Correlate With Crunch Factor In Golf And Produce Faster Clubhead Speed?, Christopher Joyce, Angus Burnett
Dec 2015
Does Flexibility Correlate With Crunch Factor In Golf And Produce Faster Clubhead Speed?, Christopher Joyce, Angus Burnett
Christopher Joyce
No abstract provided.
Does Flexibility Correlate With Crunch Factor In Golf And Produce Faster Clubhead Speed?, Christopher Joyce
Oct 2015
Does Flexibility Correlate With Crunch Factor In Golf And Produce Faster Clubhead Speed?, Christopher Joyce
Christopher Joyce
Introduction: Crunch factor (CF) in golf is the product of lateral bending of the trailing side and axial rotation velocity. CF is maximised at ball impact (BI) and is thought to increase force behind the ball and increase clubhead speed. Investigations have reported dissimilar findings on CF and low back pain although, flexibility and CF have yet to be assessed. The first aim of this study was to see if flexibility (absolute range of motion – ROM) enabled golfers to maximise CF at BI for trunk and lower trunk segments. The second aim was to see if absolute ROM variables …
Anthropometric, Fitness And Coaches’ Perceptions Of Technical Skill Favour Early Maturing Adolescent Australian Footballers, Ashley Cripps, Luke Hopper, Christopher Joyce
May 2015
Anthropometric, Fitness And Coaches’ Perceptions Of Technical Skill Favour Early Maturing Adolescent Australian Footballers, Ashley Cripps, Luke Hopper, Christopher Joyce
Christopher Joyce
During mid-adolescence, biological maturity can vary greatly between athletes of similar
chronological ages, resulting in early maturing athlete’s benefiting from greater anthropometric and
fitness characteristics, when compared to their late maturing counterparts. In Australian Football,
advantages associated with early maturation may also result in greater technical and perceived skill
efficiency. The aim of this study was to examine the impact of maturational status on
anthropometric and fitness testing, technical skill efficiency and coaches’ perceptions of skill in
talented adolescent Australian Footballers (n=225, age 15.64 ± 0.29 years). An estimation of years
from peak height velocity (Y-PHV) was used to class …
An Investigation Of Technique And Equipment Factors Associated With Clubhead Speed In Golf, Christopher Joyce
Nov 2014
An Investigation Of Technique And Equipment Factors Associated With Clubhead Speed In Golf, Christopher Joyce
Christopher Joyce
No abstract provided.
Finding The Perfect Golf Swing, Christopher Joyce
Apr 2014
Finding The Perfect Golf Swing, Christopher Joyce
Christopher Joyce
No abstract provided.
Methodological Considerations For The 3d Measurement Of The X-Factor And Lower Trunk Movement In Golf, Christopher Joyce, Angus Burnett, Kevin Ball
Aug 2010
Methodological Considerations For The 3d Measurement Of The X-Factor And Lower Trunk Movement In Golf, Christopher Joyce, Angus Burnett, Kevin Ball
Christopher Joyce
It is believed that increasing the X-factor (movement of the shoulders relative to the hips) during the golf swing can increase ball velocity at impact. Increasing the X-factor may also increase the risk of low back pain. The aim of this study was to provide recommendations for the three-dimensional (3D) measurement of the X-factor and lower trunk movement during the golf swing. This three-part validation study involved; (1) developing and validating models and related algorithms (2) comparing 3D data obtained during static positions representative of the golf swing to visual estimates and (3) comparing 3D data obtained during dynamic golf …
Combining A Strength And Power Program For Semi-Professional Footballers (Afl), Christopher Joyce
Sep 2007
Combining A Strength And Power Program For Semi-Professional Footballers (Afl), Christopher Joyce
Christopher Joyce
Training for strength through heavy resistance training will improve an athlete's ability to maximise a force that can be exerted through means of muscular tension. Combining this with power training, an athlete's ability in increasing the rate of which a muscular force can be applied through velocity or time, with use of periodised programming, this article will discuss how to enhance an athlete's overall performance. Australian Football, being a sport of high physiological conditioning needs, this article will show combined strength / power programming will meet, and excel in the expected physiological needs these athletes require. This artcile presents combined …
