|2015||Lockie RG, Schultz AB, Callaghan SJ, Jordan CA, Luczo TM, Jeffriess MD, 'A preliminary investigation into the relationship between functional movement screen scores and athletic physical performance in female team sport athletes', Biology of Sport, 32 41-51 (2015)|
There is little research investigating relationships between the Functional Movement Screen (FMS) and athletic performance in female athletes. This study analyzed the relationship... [more]
There is little research investigating relationships between the Functional Movement Screen (FMS) and athletic performance in female athletes. This study analyzed the relationships between FMS (deep squat; hurdle step [HS]; in-line lunge [ILL]; shoulder mobility; active straight-leg raise [ASLR]; trunk stability push-up; rotary stability) scores, and performance tests (bilateral and unilateral sit-and-reach [flexibility]; 20-m sprint [linear speed]; 505 with turns from each leg; modified T-test with movement to left and right [change-of-direction speed]; bilateral and unilateral vertical and standing broad jumps; lateral jumps [leg power]). Nine healthy female recreational team sport athletes (age = 22.67 Â± 5.12 years; height = 1.66 Â± 0.05 m; body mass = 64.22 Â± 4.44 kilograms) were screened in the FMS and completed the afore-mentioned tests. Percentage between-leg differences in unilateral sit-and-reach, 505 turns and the jumps, and difference between the T-test conditions, were also calculated. Spearman's correlations (p = 0.05) examined relationships between the FMS and performance tests. Stepwise multiple regressions (p = 0.05) were conducted for the performance tests to determine FMS predictors. Unilateral sit-and-reach positive correlated with the left-leg ASLR (r = 0.704-0.725). However, higher-scoring HS, ILL, and ASLR related to poorer 505 and T-test performance (r = 0.722-0.829). A higher-scored left-leg ASLR related to a poorer unilateral vertical and standing broad jump, which were the only significant relationships for jump performance. Predictive data tended to confirm the correlations. The results suggest limitations in using the FMS to identify movement deficiencies that could negatively impact athletic performance in female team sport athletes.
|2015||Lockie RG, Schultz AB, Jordan CA, Callaghan SJ, Jeffriess MD, Luczo TM, 'Can selected functional movement screen assessments be used to identify movement deficiencies that could affect multidirectional speed and jump performance?', J Strength Cond Res, 29 195-205 (2015)|
|2015||Delaney JA, Scott TJ, Ballard DA, Duthie GM, Hickmans JA, Lockie RG, Dascombe BJ, 'Contributing factors to change-of-direction ability in professional rugby league players.', J Strength Cond Res, (2015)|
|2014||Lockie RG, Murphy AJ, Callaghan SJ, Jeffriess MD, 'Effects of sprint and plyometrics training on field sport acceleration technique.', J Strength Cond Res, 28 1790-1801 (2014) [C1]|
|2014||Scott BR, Slattery KM, Sculley DV, Lockie RG, Dascombe BJ, 'Reliability of telemetric electromyography and near-infrared spectroscopy during high-intensity resistance exercise', Journal of Electromyography and Kinesiology, 24 722-730 (2014) [C1]|
This study quantified the inter- and intra-test reliability of telemetric surface electromyography (EMG) and near infrared spectroscopy (NIRS) during resistance exercise. Twelve w... [more]
This study quantified the inter- and intra-test reliability of telemetric surface electromyography (EMG) and near infrared spectroscopy (NIRS) during resistance exercise. Twelve well-trained young men performed high-intensity back squat exercise (12 sets at 70-90% 1-repetition maximum) on two occasions, during which EMG and NIRS continuously monitored muscle activation and oxygenation of the thigh muscles. Intra-test reliability for EMG and NIRS variables was generally higher than inter-test reliability. EMG median frequency variables were generally more reliable than amplitude-based variables. The reliability of EMG measures was not related to the intensity or number of repetitions performed during the set. No notable differences were evident in the reliability of EMG between different agonist muscles. NIRS-derived measures of oxyhaemoglobin, deoxyhaemoglobin and tissue saturation index were generally more reliable during single-repetition sets than multiple-repetition sets at the same intensity. Tissue saturation index was the most reliable NIRS variable. Although the reliability of the EMG and NIRS measures varied across the exercise protocol, the precise causes of this variability are not yet understood. However, it is likely that biological variation during multi-joint isotonic resistance exercise may account for some of the variation in the observed results. Â© 2014 Elsevier Ltd.
|2014||Scott BR, Dascombe BJ, Delaney JA, Elsworthy N, Lockie RG, Sculley DV, Slattery KM, 'The Validity and Reliability of a Customized Rigid Supportive Harness During Smith Machine Back Squat Exercise', JOURNAL OF STRENGTH AND CONDITIONING RESEARCH, 28 636-642 (2014) [C1]|
|2014||Lockie RG, Callaghan SJ, Berry SP, Cooke ERA, Jordan CA, Luczo TM, Jeffriess MD, 'RELATIONSHIP BETWEEN UNILATERAL JUMPING ABILITY AND ASYMMETRY ON MULTIDIRECTIONAL SPEED IN TEAM-SPORT ATHLETES', JOURNAL OF STRENGTH AND CONDITIONING RESEARCH, 28 3557-3566 (2014) [C1]|
|2014||Lockie RG, Schultz AB, Callaghan SJ, Jeffriess MD, 'The effects of traditional and enforced stopping speed and agility training on multidirectional speed and athletic function', Journal of Strength and Conditioning Research, 28 1538-1551 (2014) [C1]|
This study investigated the effects of a traditional speed and agility training program (TSA) and an enforced stopping program emphasizing deceleration (ESSA). Twenty college-aged... [more]
This study investigated the effects of a traditional speed and agility training program (TSA) and an enforced stopping program emphasizing deceleration (ESSA). Twenty college-aged team sport athletes (16 males, 4 females) were allocated into the training groups. Pretesting and posttesting included: 0-10, 0-20, 0-40 m sprint intervals, change-of-direction, and acceleration test (CODAT), T-test (multidirectional speed); vertical, standing broad, lateral, and drop jumps, medicine ball throw (power); Star Excursion Balance Test (posteromedial, medial, anteromedial reaches; dynamic stability); and concentric (240Â°Â·s-1) and eccentric (30Â°Â·s-1) knee extensor and flexor isokinetic testing (unilateral strength). Both groups completed a 6-week speed and agility program. The ESSA subjects decelerated to a stop within a specified distance in each drill. A repeated measures analysis of variance determined significant (p = 0.05) with in and between-group changes. Effect sizes (Cohen's d) were calculated. The TSA group improved all speed tests (d = 0.29-0.96), and most power tests (d = 0.57-1.10). The ESSA group improved the 40-m sprint, CODAT, T-test, and most power tests (d = 0.46-1.31) but did not significantly decrease 0-10 and 0-20 m times. The TSA group increased posteromedial and medial excursions (d = 0.97-1.89); the ESSA group increased medial excursions (d = 0.99-1.09). The ESSA group increased concentric knee extensor and flexor strength, but also increased between-leg knee flexor strength differences (d = 0.50-1.39). The loading associated with stopping can increase unilateral strength. Coaches should ensure deceleration drills allow for appropriate sprint distances before stopping, and athletes do not favor 1 leg for stopping after deceleration. Â© 2014 National Strength and Conditioning Association.
|2014||Hart NH, Spiteri T, Lockie RG, Nimphius S, Newton RU, 'Detecting deficits in change of direction performance using the preplanned multidirectional Australian football league agility test.', Journal of strength and conditioning research / National Strength & Conditioning Association, 28 3552-3556 (2014) [C1]|
|2014||Lockie RG, Callaghan SJ, Jeffriess MD, 'Acceleration Kinematics in Cricketers: Implications for Performance in the Field', JOURNAL OF SPORTS SCIENCE AND MEDICINE, 13 128-136 (2014) [C1]|
|2014||Lockie RG, Jeffriess MD, McGann TS, Callaghan SJ, Schultz AB, 'Planned and reactive agility performance in semiprofessional and amateur basketball players', International Journal of Sports Physiology and Performance, 9 766-771 (2014) [C1]|
Context: Research indicates that planned and reactive agility are different athletic skills. These skills have not been adequately assessed in male basketball players. Purpose: To... [more]
Context: Research indicates that planned and reactive agility are different athletic skills. These skills have not been adequately assessed in male basketball players. Purpose: To define whether 10-m-sprint performance and planned and reactive agility measured by the Y-shaped agility test can discriminate between semiprofessional and amateur basketball players. Methods: Ten semiprofessional and 10 amateur basketball players completed 10-m sprints and planned- and reactive-agility tests. The Y-shaped agility test involved subjects sprinting 5 m through a trigger timing gate, followed by a 45Â° cut and 5-m sprint to the left or right through a target gate. In the planned condition, subjects knew the cut direction. For reactive trials, subjects visually scanned to find the illuminated gate. A 1-way analysis of variance (P < .05) determined between-groups differences. Data were pooled (N = 20) for a correlation analysis (P < .05). Results: The reactive tests differentiated between the groups; semiprofessional players were 6% faster for the reactive left (P = .036) and right (P = .029) cuts. The strongest correlations were between the 10-m sprints and planned-agility tests (r = .590-.860). The reactive left cut did not correlate with the planned tests. The reactive right cut moderately correlated with the 10-m sprint and planned right cut (r = .487-.485). Conclusions: The results reemphasized that planned and reactive agility are separate physical qualities. Reactive agility discriminated between the semiprofessional and amateur basketball players; planned agility did not. To distinguish between male basketball players of different ability levels, agility tests should include a perceptual and decision-making component. Â© 2014 Human Kinetics, Inc.
|2014||Scott BR, Lockie RG, Davies SJG, Clark AC, Lynch DM, Janse De Jonge XAK, 'The physical demands of professional soccer players during in-season field-based training and match-play', Journal of Australian Strength and Conditioning, 22 7-15 (2014) [C1]|
|2014||Lockie RG, Jeffriess MD, McGann TS, Callaghan SJ, 'Ankle muscle function during preferred and non-Preferred 45Â° directional cutting in semi-professional basketball players', International Journal of Performance Analysis in Sport, 14 574-593 (2014) [C1]|
No research has analysed the influence of ankle muscle activity for joint mobility and stability on preferred directional cutting. Twelve basketballers completed the Y-Shaped agil... [more]
No research has analysed the influence of ankle muscle activity for joint mobility and stability on preferred directional cutting. Twelve basketballers completed the Y-Shaped agility test, requiring 45Â° cuts to the left or right, to assess planned and reactive cutting. In planned conditions, participants knew the cutting direction. In reactive conditions, participants responded to a randomly illuminated gate. Legs were defined as the outside (furthest from target gate) or inside (closest to target gate) cut legs. The preferred outside cutting leg was determined from the fastest planned cut. Electromyography measured peak normalised (against 10- meter sprint performance) activity of the tibialis anterior, peroneus longus (PL), peroneus brevis (PB), and soleus. Paired t-Tests (p > 0.05) compared preferred and non-preferred cutting legs; effect sizes (d) were calculated. There were no differences in muscle activity between the preferred and non-preferred legs in the planned (p = 0.218-0.828) or reactive (p = 0.092- 0.862) cuts. There were moderate effects for a 28% higher PL (d = 0.51), and 27% lower PB (d = 0.57) activity, for the reactive outside cut leg. Due to the synergistic nature of these muscles, there was likely no effect to agility. Irrespective of preferred cutting direction, ankle muscles respond similarly.
|2013||Lockie RG, Schultz AB, Callaghan SJ, Jeffriess MD, 'The Relationship between Dynamic Stability and Multidirectional Speed.', J Strength Cond Res, (2013)|
|2013||Lockie RG, Vickery WM, 'Kinematics that differentiate the beach flags start between elite and non-elite sprinters', Biology of Sport, 30 255-261 (2013) [C1]|
|2013||Lockie RG, Schultz AB, Callaghan SJ, Jeffriess MD, 'The effects of isokinetic knee extensor and flexor strength on dynamic stability as measured by functional reaching', Isokinetics and Exercise Science, 21 301-309 (2013) [C1]|
BACKGROUND: Team sport athletes require dynamic stability in unilateral activities for their sports, which necessitates some degree of knee flexion and extension strength. OBJECTI... [more]
BACKGROUND: Team sport athletes require dynamic stability in unilateral activities for their sports, which necessitates some degree of knee flexion and extension strength. OBJECTIVE: To analyze the possible association of knee extension and flexion strength with dynamic stability, as measured by the Star Excursion Balance Test (SEBT). METHODS: Sixteen male team sport athletes completed the SEBT, which involves a series of unilateral squats with the subject maximally reaching with the other leg in eight directions. Knee muscle strength was measured isokinetically both concentrically (60Â°/s, 180Â°/s, 240Â°/s) and eccentrically (30Â°/s). Subjects were divided into better and lesser groups based on mean functional reach distance. A 1-way analysis of variance (p= 0.05) determined between-group differences in reach distances and relative torque. RESULTS: Subjects with better dynamic stability generated greater knee extensor torque concentrically at 180Â°/s for the right leg, and at all speeds for the left leg. The effects of knee strength were particularly noteworthy for the left leg, as subjects with better dynamic stability reached significantly further across all 8 directions. CONCLUSION: The results indicate that greater knee extensor strength may enhance unilateral dynamic stability in team sport athletes. Â© 2013 - IOS Press and the authors. All rights reserved.
|2013||Lockie RG, Murphy AJ, Schultz AB, Jeffriess MD, Callaghan SJ, 'Influence of Sprint Acceleration Stance Kinetics on Velocity and Step Kinematics in Field Sport Athletes', Journal of Strength and Conditioning Research, 27 2494-2503 (2013) [C1]|
|2013||Lockie RG, Callaghan SJ, Jeffriess MD, 'Analysis of specific speed testing for cricketers', Journal of Strength and Conditioning Research, 27 2981-2988 (2013) [C1]|
|2013||Lockie RG, Schultz AB, Callaghan SJ, Jeffriess MD, Berry SP, 'Reliability and Validity of a New Test of Change-of-Direction Speed for Field-Based Sports: the Change-of-Direction and Acceleration Test (CODAT)', JOURNAL OF SPORTS SCIENCE AND MEDICINE, 12 88-96 (2013) [C1]|
|2013||Scott BR, Lockie RG, Knight TJ, Clark AC, de Jonge XAKJ, 'A Comparison of Methods to Quantify the In-Season Training Load of Professional Soccer Players', INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE, 8 195-202 (2013) [C1]|
|2012||Lockie RG, Schultz A, Jeffriess MD, Callaghan SJ, 'The relationship between bilateral differences of knee flexor and extensor isokinetic strength and multi-directional speed', Isokinetics and Exercise Science, 20 211-219 (2012) [C1]|
|2012||Lockie RG, Murphy AJ, Schultz A, Knight TJ, Janse De Jonge XA, 'The effects of different speed training protocols on sprint acceleration kinematics and muscle strength and power in field sport athletes', Journal of Strength and Conditioning Research, 26 1539-1550 (2012) [C1]|
|2012||Lockie RG, Vickery WM, Janse De Jonge XA, 'Kinematics of the typical beach flags start for young adult sprinters', Journal of Sports Science and Medicine, 11 444-451 (2012) [C1]|
|2012||Lockie RG, Murphy AJ, Scott BR, Janse De Jonge XA, 'Quantifying session ratings of perceived exertion for field-based speed training methods in team sport athletes', Journal of Strength and Conditioning Research, 26 2721-2728 (2012) [C1]|
|2012||Lockie RG, Jeffriess MD, Callaghan SJ, 'Running velocity during the run-a-three in experienced cricketers', Serbian Journal of Sports Sciences, 6 103-110 (2012) [C1]|
|2012||Lockie RG, Schultz A, Callaghan SJ, Jeffriess MD, 'Physiological profile of national-level junior American football players in Australia', Serbian Journal of Sports Sciences, 6 127-136 (2012) [C2]|
|2012||Lockie RG, Jeffriess MD, Schultz A, Callaghan SJ, 'Relationship between absolute and relative power with linear and change-of-direction speed in junior American football players from Australia', Journal of Australian Strength and Conditioning, 20 4-12 (2012) [C1]|
|2011||Lockie RG, Murphy AJ, Knight TJ, Janse De Jonge XA, 'Factors that differentiate acceleration ability in field sport athletes', Journal of Strength and Conditioning Research, 25 2704-2714 (2011) [C1]|
|2007||Spinks CD, Murphy AJ, Spinks WL, Lockie RG, 'The effects of resisted sprint training on acceleration performance and kinematics in soccer, rugby union, and Australian football players', JOURNAL OF STRENGTH AND CONDITIONING RESEARCH, 21 77-85 (2007) [C1]|
|2003||Lockie RG, Murphy AJ, Spinks CD, 'Effects of resisted sled towing on sprint kinematics in field-sport athletes', JOURNAL OF STRENGTH AND CONDITIONING RESEARCH, 17 760-767 (2003) [C1]|
|2003||Murphy AJ, Lockie RG, Coutts AJ, 'Kinematic determinants of early acceleration in field sport athletes', Journal of Sports Science and Medicine, 2 144-150 (2003) [C1]|
Acceleration performance is important for field sport athletes that require a high level of repeat sprint ability. Although acceleration is widely trained for, there is little evi... [more]
Acceleration performance is important for field sport athletes that require a high level of repeat sprint ability. Although acceleration is widely trained for, there is little evidence outlining which kinematic factors delineate between good and poor acceleration. The aim of this study was to investigate the kinematic differences between individuals with fast and slow acceleration. Twenty field sport athletes were tested for sprint ability over the first three steps of a 15m sprint. Subjects were filmed at high speed to determine a range of lower body kinematic measures. For data analysis, subjects were then divided into relatively fast (n = 10) and slow (n = 10) groups based on their horizontal velocity. Groups were then compared across kinematic measures, including stride length and frequency, to determine whether they accounted for observed differences in sprint velocity. The results showed the fast group had significantly lower (~11-13%) left and right foot contact times (p < .05), and an increased stride frequency (~9%), as compared to the slow group. Knee extension was also significantly different between groups (p < .05). There was no difference found in stride length. It was concluded that those subjects who are relatively fast in early acceleration achieve this through reduced ground contact times resulting in an improved stride frequency. Training for improved acceleration should be directed towards using coaching instructions and drills that specifically train such movement adaptations. Â©Journal of Sports Science and Medicine (2003).