ORCID Profile
0000-0002-4576-9185
Current Organisations
Murdoch University
,
Hockey Australia
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Publications
Effect of Plyometric Training on Speed and Change of Direction Ability in Elite Field Hockey Players
Publisher: MDPI AG
Date: 12-11-2018
Abstract: This study investigated the effects of two plyometric training protocols on sprint and change of direction (COD) performance in elite hockey players. A parallel-group randomized controlled trial design was used and seventeen elite male and female field hockey players were randomly allocated into either low-to-high (L-H, n = 8) or high-to-low (H-L, n = 9) training groups. Each group performed separate variations of the drop jump exercise twice weekly for six weeks, with an emphasis on either jump height (L-H) or drop height (H-L). Performance variables assessed included sprint times over 10 m and 20 m, as well as 505 time. A two-way repeated measures analysis of variance was performed and Cohen’s d effect sizes (ESs) were calculated. The H-L group displayed a significant small ES improvement from baseline to post-training in the 10 m sprint (1.893 ± 0.08 s pre vs. 1.851 ± 0.06 s post) (ES = −0.44) (p 0.05). Differences between groups for 10 m and 20 m sprint performance failed to reach statistical significance, and no significant differences were observed within or between groups for 505 time. These findings highlight the difficulty in substantially enhancing speed and COD ability in highly trained athletic populations through the addition of a low volume, short duration plyometric training protocol.
Implementing Skill Acquisition Research in High-Performance Sport: Reflecting on the Importance of Autonomy-Support for Successful Collaboration
Publisher: Informa UK Limited
Date: 04-09-2022
Player movement patterns and game activities in the Australian Football League
Publisher: Elsevier BV
Date: 09-2004
DOI: 10.1016/S1440-2440(04)80023-9
Abstract: In the Australian Football League (AFL), specific game movements and activities have not been studied since the 1970s and 1980s and the game is now much faster than it was 20-30 years ago. Using lapsed-time video analysis, AFL players from five different positions (full forward/full back, centre half forward/centre half back, small forward/small back, mid fielders and ruckmen) had their movement patterns (stand, walk, jog, fast-run, sprint, change of direction) and game activities (possessions, ruck duels, ground ball contests, shepherds, spoils, bumps and tackles) recorded in two games each in the 2000 season. A descriptive analysis of the results was undertaken. The main findings were: full forward/full back were most different from the other positions, as they were seen to stand more and jog and fast-run less: ruckmen and midfielders were involved in more game activities than the other positions for all positions, there were more than 150 high intensity movements (fast-run plus sprint) in the game, but these accounted for only 4-6% of total movement time: virtually all of the high intensity movements lasted for <6 secs more than half of all sprints involved at least one change of direction, mostly within the 0-90 degrees arc (left or right) and all ground ball contests took <6 secs, with midfielders having 2-3 times as many as the other positions. Improvements in specific pre-season and in-season training practices for different positions should be possible after careful interpretation of these findings.
Specificity and transfer of lower-body strength: Influence of bilateral or unilateral lower-body resistance training
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 02-2019
DOI: 10.1519/JSC.0000000000002923
Abstract: Appleby, BB, Cormack, SJ, and Newton, RU. Specificity and transfer of lower-body strength: Influence of bilateral or unilateral lower-body resistance training. J Strength Cond Res 33(2): 318–326, 2019—To examine the development of lower-body strength using either bilateral or unilateral resistance training. Developmental rugby players ( n = 33 mean training age = 5.4 ± 2.9 years 1 repetition maximum [1RM] 90° squat = 178 ± 27 kg) completed an 18-week randomized controlled training design (bilateral group [BIL], n = 13 unilateral group [UNI], n = 10 comparison, n = 10). The 8-week training phase involved 2 lower-body, volume-load matched resistance sessions per week (6–8 sets × 4–8 reps at 45–88% 1RM), differing only in the prescription of a bilateral (back squat) or unilateral (step-up) resistance exercise. Maximum strength was assessed by a randomized order of 1RM back squat and step-up testing and analyzed for within- and between-group differences using effect sizes (ES ± 90% confidence limits [CL]). Both training groups showed practically important improvements in their trained exercise (ES ± 90% CL: BIL = 0.67 ± 0.48 UNI = 0.74 ± 0.38) with transfer to their nontrained resistance exercise (BIL step-up = 0.27 ± 0.39: UNI squat = 0.42 ± 0.39). The difference between groups in adaptation of squat strength was unclear (BIL ES = −0.34 ± 0.55), while the UNI group showed an advantage in step-up training (ES = 0.41 ± 0.36). The results demonstrate that practically important increases in lower-body strength can be achieved using bilateral or unilateral resistance training and development of that strength may be expressed in the movement not trained, supporting the transfer of strength training between exercises of similar joint movements and muscles. Coaches may choose to incorporate unilateral strength training where the prescription of bilateral training may be inhibited.
Validity and Reliability of Methods to Determine Barbell Displacement in Heavy Back Squats: Implications for Velocity-Based Training
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 11-2020
DOI: 10.1519/JSC.0000000000002803
Abstract: Appleby, BB, Banyard, H, Cormack, SJ, and Newton, RU. Validity and reliability of methods to determine barbell displacement in heavy back squats: Implications for velocity-based training. J Strength Cond Res 34(11): 3118–3123, 2020—The purpose of this study was to investigate the validity and reliability of methods for determining barbell displacement during heavy back squats. Twelve well-trained rugby union players (mean ± SD 1 repetition maximum [1RM] 90° squat = 196.3 ± 29.2 kg) completed 2 sets of 2 repetitions at 70, 80, and 90% of 1RM squats. Barbell displacement was derived from 3 methods across 4 load categories (120–129, 140–149, 160–169, and 180–189 kg) including: a (a) linear position transducer (LPT) attached 65 cm left of barbell center, (b) 3D motion analysis tracking of markers attached to either end of a barbell, and (c) cervical marker (C7) (criterion measurement). Validity was calculated using the typical error of the estimate as a coefficient of variation (CV%) ±90% confidence interval (CI), mean bias as a percentage, and the Pearson product moment correlation ( r ). Intraday reliability was calculated using the intraclass correlation coefficient and the typical error expressed as a percentage of CV% ±90% (CI). Mean displacement for C7, LPT, and the barbell ends was 520, 529, and 550–564 mm, respectively. Validity of the LPT compared with the criterion was acceptable (CV% = 2.1–3.0 bias = 0.9–1.5% r = 0.96–0.98), whereas that of the barbell ends was less (CV% = 2.7–7.5 bias = 4.9–11.2% r = 0.71–0.97). The CV% reliability of the C7 marker across the load categories was 6.6%, the LPT 6.6%, and the barbell ends between 5.9 and 7.2%. Despite reliable measures, overestimation of displacement occurs as the tracking location moves to the barbell ends in weighted back squats. The LPT demonstrated high validity to the criterion and high trial-to-trial reliability.
Effects of two neuromuscular training programs on running biomechanics with load carriage: A study protocol for a randomised controlled trial
Publisher: Springer Science and Business Media LLC
Date: 22-10-2016
Does expert perceptual anticipation transfer to a dissimilar domain?
Publisher: American Psychological Association (APA)
Date: 06-2015
DOI: 10.1037/XHP0000021
Abstract: The purpose of this experiment was to extend theoretical understanding of transfer of learning by investigating whether expert perceptual anticipation skill transfers to a dissimilar domain. The capability of expert and near-expert rugby players as well as novices to anticipate skill type within rugby (learning sport) was first examined using a temporal occlusion paradigm. Participants watched video footage of an opponent performing rugby skill types that were temporally occluded at different points in the opponent's action and then made a written prediction. Thereafter, the capability of participants to transfer their anticipation skill to predict pitch type in baseball (transfer sport) was examined. Participants watched video footage of a pitcher throwing different pitch types that were temporally occluded and made a written prediction. Results indicated that expert and near-expert rugby players anticipated significantly better than novices across all occlusion conditions. However, none of the skill groups were able to transfer anticipation skill to predict pitch type in baseball. The findings of this paper, along with existing literature, support the theoretical prediction that transfer of perceptual anticipation is expertise dependent and restricted to similar domains.
Changes in strength over a 2-year period in professional Rugby Union players
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 09-2012
Comparison of training activities and game demands in the Australian Football League
Publisher: Elsevier BV
Date: 09-2004
DOI: 10.1016/S1440-2440(04)80024-0
Abstract: his paper serves as a companion to our recent study of the movement patterns and game activities of players (from five different positions) during matches in the 2000 Australian Football League season. Using lapsed-time video analysis, the same in idual players (n= 11) as filmed in matches were also monitored during 21 in-season, main training sessions conducted by their clubs in order to assess the degree to which training activities matched game demands. In general, the training sessions did not involve physical pressure therefore there were very few contested marks and ground balls or tackles, shepherds and spoils, thereby not matching these game demands. Players typically had more possessions (kicks and handballs) at training than in games. They also spent a greater percentage of total time standing and less time walking at training than in games. Fast-running and sprinting efforts at training were almost all for durations of <6 secs, which matched game demands, as did changes of direction when sprinting, which were almost all in a 0-90 degrees arc. However, across all players filmed, high intensity (fast-running and sprinting) movements were not performed as frequently at training (one every 76 secs) as in games (one every 51 secs). Therefore, while some game demands were adequately replicated at training, others were not closely simulated, suggesting that, after careful interpretation of these results, some improvements in training practices could be made.
Reliability of squat kinetics in well-trained rugby players: Implications for monitoring training
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 10-2019
DOI: 10.1519/JSC.0000000000003289
Abstract: Appleby, BB, Cormack, SJ, and Newton, RU. Reliability of squat kinetics in well-trained rugby players: implications for monitoring training. J Strength Cond Res 33(10): 2635–2640, 2019—The aim of this study was to determine the within-session reliability in kinetic variables of the squat in well-trained athletes during a typical resistance training protocol. Fifteen subjects completed 2 testing sessions. Session 1 was establishment of 1 repetition maximum (1RM) squat, and session 2 involved 2 sets of 2 maximal effort repetitions of the squat at 70, 80, and 90% of 1RM with 3D motion analysis and ground reaction force (GRF) measurement using 2 in-ground triaxial force plates. Reliability was calculated using typical error ± 90% confidence limits, expressed as the coefficient of variation and intraclass correlation coefficient. The smallest worthwhile change (SWC%), calculated as 0.2 × between-subject SD , was used to determine the smallest important change in performance. Peak GRF and average GRF were found to have acceptable measures of reliability with the combined left and right leg average GRF capable of detecting the SWC. Independent limb contributions were reliable (left and right, or dominant and nondominant). Reliable kinetics can be obtained in back squat performance typical of a resistance training session in well-trained athletes. This suggests that coaches integrating force plate technology within training sessions may effectively capture between 1 and 6 training sets among several athletes, facilitating analysis and intervention on larger data sets.
Deceleration characteristics of elite Australian male field hockey players during an Olympic tournament
Publisher: Elsevier BV
Date: 05-2019
DOI: 10.1016/J.JSAMS.2018.11.019
Abstract: This study described the deceleration efforts of the Australian men's field hockey team during the 2016 Olympics by categorising efforts into 'bands' of intensity and comparing the deceleration intensity and frequency by player position, game period and opponent. Descriptive retrospective analysis. Global positioning system sensors (MinimaxX S4, Catapult Sports Pty. Ltd., Melbourne, Australia 10Hz) were worn by 15 male field hockey players during six games of the 2016 Olympic tournament. There were 8998 in idual deceleration efforts (≤-3ms Decelerations are common in elite field hockey and very high intensities are present. These findings, in conjunction with other metrics can be used as a tool to monitor the load associated with training and match play in field hockey.
Unilateral and Bilateral Lower-Body Resistance Training Does not Transfer Equally to Sprint and Change of Direction Performance
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 2020
DOI: 10.1519/JSC.0000000000003035
Abstract: Appleby, BB, Cormack, SJ, and Newton, RU. Unilateral and bilateral lower-body resistance training does not transfer equally to sprint and change of direction performance. J Strength Cond Res 34(1): 54–64, 2020—Given maximal strength can be developed using bilateral or unilateral resistance training, the purpose of this study was to determine the magnitude of transfer of unilateral or bilateral resistance training to sprint and change of direction (COD) performance. Thirty-three trained participants (average training age = 5.4 ± 2.9 years and 1 repetition maximum [1RM] 90° squat = 177.6 ± 26.7 kg) completed either a bilateral group (BIL, n = 13), unilateral (UNI, n = 10), or comparison (COM, n = 10) 18-week randomized controlled training design. Training involved 2 lower-body, volume-load–matched resistance sessions per week (6–8 sets × 4–8 reps at 45–88% 1RM), differing only in the prescription of a bilateral (squat) or unilateral (step-up) resistance exercise. Strength was assessed through 1RM squat and step-up, in addition to 20-m sprint and a customized 50° COD test. The effect size statistic ± 90% confidence limit (ES ± CL) was calculated to examine the magnitude of difference within and between groups at each time point. BIL and UNI groups improved their trained and nontrained strength exercise with an unclear difference in adaptation of squat strength (ES = −0.34 + 0.55). Both groups improved 20-m sprint (ES: BIL = −0.38 ± 0.49 and UNI = −0.31 ± 0.31) however, the difference between the groups was unclear (ES = 0.07 ± 0.58). Although both groups had meaningful improvements in COD performance, bilateral resistance training had a greater transfer to COD performance than unilateral resistance training (between-groups ES = 0.59 ± 0.64). Both bilateral and unilateral training improved maximal lower-body strength and sprint acceleration. However, the BIL group demonstrated superior improvements in COD performance. This finding potentially highlights the importance of targeting the underlying physiological stimulus that drives adaptation and not exercise selection based on movement specificity of the target performance.
KINETICS AND KINEMATICS OF THE SQUAT AND STEP-UP IN WELL-TRAINED RUGBY PLAYERS
Publisher: Ovid Technologies (Wolters Kluwer Health)
Date: 07-2019
DOI: 10.1519/JSC.0000000000003055
Abstract: Appleby, BB, Newton, RU, and Cormack, SJ. Kinetics and kinematics of the squat and step-up in well-trained rugby players. J Strength Cond Res 33(7S): S36–S44, 2019—The purpose of this study was to compare and contrast the kinetics and kinematics of squat and step-up performance in well-trained athletes. Triaxial ground reaction force (GRF) and 3D kinematic data were collected in 4 maximal effort repetitions each at 70, 80, and 90% of 1 repetition maximum (1RM) of squat and step-up. The difference in concentric phase kinetics and kinematics between the squat and step-up was compared using effect sizes (ES ± 90% confidence limits [CLs]) classified as: less than 0.2 as trivial 0.2–0.6 as small 0.6–1.2 as moderate and 1.2–2.0 as large. Where the 90% CL crossed negative and positive 0.2 values, the effect was considered “unclear.n Ground reaction force was higher for the step-up than squat at all relative intensities per leg (peak GRF ES: 2.56 ± 0.19 to 2.70 ± 0.37 average GRF ES: 1.45 ± 0.27 to 1.48 ± 0.29). Per leg, the difference in concentric impulse favored the step-up compared with squat at 70% 1RM (ES = 0.71 ± 0.40) and 80% 1RM (ES = 0.30 ± 0.41) but was unclear at 90% 1RM (ES = −0.25 ± 0.47). The squat peak velocity was greater compared with step-up at all intensities (ES = −1.74 ± 0.48 to −1.33 ± 0.48). Despite a lower external load and a single base of support, per leg, the step-up produced comparable GRF because the squat suggesting overload provided by the step-up is sufficient for maximal strength development. Future research may investigate the efficacy of the step-up in a training intervention for the development of lower-body strength.
Effect of Plyometric Training on Speed and Change of Direction Ability in Elite Field Hockey Players
Publisher: MDPI AG
Date: 11-10-2018
DOI: 10.20944/PREPRINTS201810.0233.V1
Abstract: This study investigated the effects of two plyometric training protocols on sprint and change of direction (COD) performance in elite hockey players. A parallel-group randomized controlled trial design was used and seventeen elite male and female field hockey players were randomly allocated into either low-to-high (L-H, n = 8) or high-to-low (H-L, n = 9) training groups. Each group performed separate variations of the drop jump exercise twice weekly for six weeks, with an emphasis on either jump height (L-H) or drop height (H-L). Performance variables assessed included sprint times over 10 m and 20 m, as well as 505 time. A two-way repeated measures analysis of variance was performed and Cohen& rsquo s d effect sizes were calculated. The H-L group displayed significant small ES improvement from baseline to post-training in the 10 m sprint (1.893 & lusmn 0.08 s pre vs 1.851 & lusmn 0.06 s post) (ES = & minus .44) (P = & .05). Small but not statistically significant differences between groups were observed for 10 m and 20 m sprint performance, and no significant differences were observed within or between groups for 505 time. These findings highlight the difficulty in substantially enhancing speed and COD ability in highly trained athletic populations through the addition of a low volume, short duration plyometric training protocol.
Video analysis of selected game activities in Australian Rules Football
Publisher: Elsevier BV
Date: 06-2002
DOI: 10.1016/S1440-2440(02)80034-2
Abstract: The frequency and outcome of common game activities during Australian football matches have not previously been reported. The aim of this investigation was to determine the frequency and outcome of marking opportunities (MO), ruck contests (RC) and kick-ins (KI). for the purpose of potentially refining current training methods to better replicate common game occurrences. Video footage of all 24 Australian Football League (AFL) matches in which the West Coast Eagles (WCE) participated during the 1997 premiership season was viewed. Notational analysis was used to record information for both the WCE and the opposition during MO, RC and KI. There was an average of 259 MO per game, of which 42.5% were unopposed by either team (1/0 or 0/1) and 45.0% involved one player from each team (1/1). The average success rate of unopposed marks (1/0 and 0/1) was 88.3%, opposed (1/1) 29.3% and, for all MO's combined, 53.5%. There was an average of 99 RC per game, of which 48 were bounce-downs (28 centre bounces) and 51 boundary throw-ins. The clearance rates from RC for WCE and the opposition were not associated with winning the match or each quarter (p> 0.05, R = 0.000), nor did the clearance rate correlate with other measures of game success (scoring shots, team quarter score, the difference in score between teams or the lead change each quarter). There was an average of 21 KI per game. For both teams combined, long kicks (over 50 metres) were the most preferred form of KI (49%) compared to medium (between 25 and 50 metres) (30%) and short (under 25 metres) (21%). Long kicks were the most ineffective at directly retaining possession (29.0%) whilst short kicks were the most effective (93.4%). Some practical (training) implications, based on these results, are discussed.
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No related grants have been discovered for Brendyn Appleby.