Article
Neurosciences
Meta N. Eek, Jesper Augustsson, Roland Zugner, Roy Tranberg
Summary: This study aimed to investigate the feasibility and usefulness of measuring single-leg vertical jumping in young adults with cerebral palsy (CP). The results showed that this test was able to accurately measure jump height and power generation in individuals with CP, providing additional information about motor function.
Article
Sport Sciences
Dean E. Callaghan, Joshua H. Guy, Crystal O. Kean, Aaron T. Scanlan, Alexander H. M. Kertesz, Nathan Elsworthy
Summary: This study examined changes in neuromuscular status in sub-elite rugby league players post-match. Findings showed a significant decrease in back squat mean concentric velocity and CMJ height post-match, with CMJ height returning to baseline at +48 hours. Positive correlations were found between changes in back squat mean concentric velocity and CMJ height.
JOURNAL OF SCIENCE AND MEDICINE IN SPORT
(2021)
Article
Sport Sciences
Matthew Zukowski, Walter Herzog, Matthew J. Jordan
Summary: This study examined the intraday reliability of two novel unilateral loaded jump protocols designed for long track speed skaters and correlated them with performance in speed skating. The results showed that unilateral loaded jump tests are reliable in speed skating athletes and can be used to diagnose and monitor lower-limb maximal muscle power capacity.
JOURNAL OF STRENGTH AND CONDITIONING RESEARCH
(2023)
Article
Sport Sciences
Diego A. Alonso-Aubin, Ivan Chulvi-Medrano, Juan M. Cortell-Tormo, Moises Picon-Martinez, Tamara Rial Rebullido, Avery D. Faigenbaum
Summary: The study investigated force-velocity profiling in adolescent rugby players, focusing on squat and bench press exercises, and comparing differences between male and female athletes. Significant sex-related differences were found in both squat and bench press exercises, suggesting the importance of targeted strength and conditioning programs for adolescent rugby players.
JOURNAL OF STRENGTH AND CONDITIONING RESEARCH
(2021)
Article
Physiology
Dawid Kozlenia, Jaroslaw Domaradzki
Summary: This study aimed to establish if there are sex differences in post-activation performance enhancement (PAPE) effect on jump height. The results showed that there are differences in performance changes between males and females after isometric training, with greater changes observed in males. Although the protocol had positive short-term effects on females, its usefulness is limited.
FRONTIERS IN PHYSIOLOGY
(2023)
Article
Multidisciplinary Sciences
Korbinian Sebastian Hermann Ksoll, Matthias Cotic, Kathrin Schmalzl, Knut Beitzel, Andrea Achtnich, Andreas Imhoff, Ansgar Schwirtz, Florian Kreuzpointner, Wolfgang Seiberl
Summary: This study investigated the inter-limb symmetry and movement coordination of single-leg squat (SLS) using the modified vector coding technique. The results showed no significant differences between both legs and revealed inter-limb symmetry in movement coordination. Furthermore, different coordination patterns were observed in downward movement, change of direction, and upward movement.
Article
Orthopedics
Katherine M. Everhart, Kenzie B. Friesen, Nicole M. Bordelon, Anthony W. Fava, Hillary A. Plummer, David M. Shannon, Gretchen D. Oliver
Summary: This study compared the kinematics of single-leg squat (SLS) performance in collegiate softball pitchers with and without upper extremity pain. The results showed no significant difference in SLS mechanics between the two groups, but the drive-leg mechanics were more stable than the stride-leg mechanics.
ORTHOPAEDIC JOURNAL OF SPORTS MEDICINE
(2023)
Article
Physiology
Sondre Nysether, Will G. Hopkins, Fredrik Mentzoni, Goran Paulsen, Thomas A. Haugen, Paul A. Solberg
Summary: The purpose of this study was to determine the utility of countermovement jump and Keiser leg-press tests for tracking changes in elite athletes of different sports. The results showed that Keiser peak power and relative peak power had the highest proportions of decisive changes, followed by jump height, Keiser mean power, and relative mean power. The findings suggest that these measures, except for the Keiser test velocity intercept, are useful for routine monitoring in elite athletes.
INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE
(2023)
Article
Multidisciplinary Sciences
Paloma Guillen-Rogel, Cristina San Emeterio, Pedro J. Marin
Summary: The purpose of this study was to evaluate the reliability of a clinical observation method to assess and determine the relationship between navicular drop (ND) and ankle control in the single leg squat (SLSankle). The study found that the SLSankle score provided a reliable and valid alternative for quantifying foot mobility in comparison to the ND test.
Article
Multidisciplinary Sciences
Dawid Kozlenia, Jaroslaw Domaradzki
Summary: This study aimed to evaluate the effectiveness of two protocols, slow tempo bodyweight squat combined with an isometric squat (ST-ISO) and an isometric squat alone (ISO), for enhancing jump height. The results showed that the ST-ISO group had decreased performance in the early minutes, but improved significantly in the final minute. However, there was no significant difference in jump height improvement between the two protocols. The study suggests that attention should be given to the rest period after activity and individualized approaches are needed.
Article
Multidisciplinary Sciences
Takuya Nishioka, Junichi Okada
Summary: Understanding the properties associated with vertical force-velocity (F-v) profiles is crucial for optimizing jump performance. This study examined the associations between maximum and reactive strength indicators and F-v profiles obtained from squat jump (SJ) and countermovement jump (CMJ). The results showed that maximum strength is more important than reactive strength in improving vertical F-v profiles. Furthermore, the importance of maximum strength may vary depending on whether the practitioner wants to maximize SJ or CMJ performance.
Article
Environmental Sciences
Michal Spieszny, Robert Trybulski, Piotr Biel, Adam Zajac, Michal Krzysztofik
Summary: The study aimed to evaluate the effect of a maximum isometric squat as an isometric conditioning activity on squat jump and countermovement jump height. The findings indicate that the maximum isometric squat as a conditioning activity effectively improved the height of squat jump and countermovement jump, and the presence or absence of a stretch and shortening cycle did not significantly impact the performance enhancement response.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Rheumatology
Gregor Kuntze, Alberto Nettel-Aguirre, Julia Brooks, Shane Esau, Colleen Nesbitt, Dianne Mosher, Marinka Twilt, Susanne Benseler, Janet L. Ronsky, Carolyn A. Emery
Summary: This study examined the biomechanics of single leg squat (SLS) in youth with juvenile idiopathic arthritis (JIA) and their healthy peers. The results showed that JIA patients performed the SLS with more internally rotated hip, while female participants displayed better hip flexion/extension range of motion. Additionally, associations were found between body mass index, knee flexion angle, and hip range of motion during the SLS task.
ARTHRITIS CARE & RESEARCH
(2021)
Article
Sport Sciences
Steven M. Hirsch, Christopher J. Chapman, David M. Frost, Tyson A. C. Beach
Summary: In this study, the mechanical energy expenditure at the lumbar spine and lower extremity joints during single-leg squat movements was investigated using a 3D inverse dynamical linked-segment model. The results showed that the foot position had an impact on the distribution of mechanical energy expenditure and that men had higher energy expenditure compared to women.
JOURNAL OF STRENGTH AND CONDITIONING RESEARCH
(2022)
Article
Computer Science, Information Systems
Manman Zhao, Jinjin Zhang
Summary: This study analyzed and compared the biomechanical characteristics of squat jump and half-squat jump. The results showed significant differences in knee joint angle and ankle joint angle at the time of toe off. The time law of squat jump and half-squat jump in vertical jump was the same, and they had no effect on the height, time, and speed of exercise take-off.
MOBILE INFORMATION SYSTEMS
(2022)
Article
Engineering, Biomedical
Kym J. Williams, Dale W. Chapman, Elissa J. Phillips, Nick B. Ball
Summary: This investigation examines the measurement agreement in force, velocity, and power values derived from three commonly applied assessment techniques during a countermovement jump (CMJ). The results reveal disparities in measurement agreement across different assessment techniques and load conditions. The linear optical encoder (LOE) overestimates peak velocity, peak force, peak power, and mean power, while the force plate (FP) underestimates mean power and peak power. However, measurement bias and dispersion decrease during the loaded condition.
SPORTS BIOMECHANICS
(2022)
Article
Sport Sciences
Kirsten L. A. Everett, Dale W. Chapman, John A. Mitchell, Nick Ball
Summary: This study examined the changes in loaded countermovement jumps in elite male rowers during precompetition and competition training mesocycles to assess neuromuscular fatigue. The results showed that training during these cycles did not result in significant decreases in the athletes' jump performance, suggesting minimized fatigue.
JOURNAL OF STRENGTH AND CONDITIONING RESEARCH
(2022)
Article
Sport Sciences
Kirsten L. A. Everett, Dale W. Chapman, John A. Mitchell, Nick Ball
Summary: This study assessed the impact of westbound trans-meridian travel on changes in countermovement jump (CMJ) performance in highly trained aerobic athletes. The results showed small-to-moderate changes in CMJ performance following westbound travel. These changes may be related to high training loads before travel and travel time serving as a recovery period.
JOURNAL OF STRENGTH AND CONDITIONING RESEARCH
(2022)
Article
Engineering, Industrial
Celeste E. Coltman, Brooke R. Brisbine, Richard H. Molloy, Nick B. Ball, Wayne A. Spratford, Julie R. Steele
Summary: The study revealed that current Australian Defence Force body armour is not suitable for female soldiers in terms of design, issuance, and education. Recommendations include incorporating anthropometric data of female soldiers into future body armour designs and reviewing training protocols for body armour use.
APPLIED ERGONOMICS
(2021)
Review
Sport Sciences
Daniel B. Tait, Phillip Newman, Nick B. Ball, Wayne Spratford
Summary: This systematic review and meta-analysis found that dynamic ankle measures can accurately estimate initial contact angles and peak moments of the knee during vertical landing, regardless of landing task or individual subject characteristics. This provides a theoretical basis for the importance of the ankle in preventing anterior cruciate ligament (ACL) injuries.
JOURNAL OF SCIENCE AND MEDICINE IN SPORT
(2022)
Article
Sport Sciences
Fergus Nutt, Samuel P. Hills, Mark Russell, Mark Waldron, Phil Scott, Jonty Norris, Christian J. Cook, Billy Mason, Nick Ball, Liam P. Kilduff
Summary: The study compared the effects of general and cricket-specific morning priming exercises on professional male cricketers' afternoon physical and cognitive performance. Both types of exercises were found to be effective in enhancing the athletes' performance.
JOURNAL OF SCIENCE AND MEDICINE IN SPORT
(2022)
Article
Sport Sciences
Michael G. Sydney, Martin Wollin, Dale W. Chapman, Nick Ball, Jocelyn K. Mara
Summary: Relative metrics are commonly used to evaluate soccer player movement demands, but this study focused on comparing the relative and peak player demands during training and competition matches. Results suggest that various-sided training games have an impact on peak player movements, indicating the importance of supplementing training with high-speed running to prepare players for the demands of competition matches.
Article
Environmental Sciences
Nicole Freene, Katie Porra, Jaquelin A. Bousie, Mark Naunton, Nick Ball, Andrew Flood, Kasia Bail, Sally De-Vitry Smith, Milli Blenkin, Lynn Cheong, Madeleine Shanahan, Stephen Isbel, Myra Leung, Ann B. Gates
Summary: The study investigated the promotion, preparedness, and knowledge of physical activity among university nursing and allied health students and staff, as well as the usage of PA resources within curricula before and after an educational intervention. Despite high confidence in PA promotion and advice provision, there was poor knowledge of PA guidelines among participants. The use of teaching resources increased significantly across disciplines, but there was no significant change in PA promotion preparedness and knowledge over 12 months.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Engineering, Biomedical
Rhiannon A. Campbell, Elizabeth J. Bradshaw, Nick Ball, Adam Hunter, Wayne Spratford
Summary: This study aimed to investigate the forearm loading and symmetry in gymnastics vaulting. The results indicate that limb loading patterns in advanced gymnastics are highly individualized, and individual analysis is necessary to identify gymnasts or limbs at an increased risk for overuse injury.
SPORTS BIOMECHANICS
(2023)
Article
Sport Sciences
Brayden Mifsud, Jessica M. Stephens, John Warmenhoven, Nick Ball
Summary: ACL injuries have a significant impact on athletic performance and long-term quality of life. Force plates and qualitative screening tools are effective methods to identify abnormal movement quality associated with increased injury risk. This study used qualitative landing assessments and functional principal component analysis (fPCA) to examine force-time curves and found that low-risk landers demonstrated longer contact times and different loading patterns compared to high-risk landers.
SCANDINAVIAN JOURNAL OF MEDICINE & SCIENCE IN SPORTS
(2023)
Article
Hospitality, Leisure, Sport & Tourism
Steven B. Rynne, Cassandra K. Dittman, Keane W. Wheeler, Cliff J. Mallett, Matthew R. Sanders
Summary: This study explores the experiences of Aboriginal parents in the Junior Rugby League in Australia. It finds that Aboriginal parents have a higher identification and investment in rugby league, suggesting that JRL may serve as a potential source of support for Aboriginal parents.
Article
History
Murray G. G. Phillips, Gary Osmond, Keane Wheeler
Summary: In Australia, Aboriginal and Torres Strait Islander peoples have a long history of involvement in Western sports, which were influenced by British, European, American, and Australian influences. The concept of sporting literacy is introduced to understand their motivations, decision-making processes, agency, and how sports were used as a forum for resistance against settler colonialism. Four case studies are examined and analyzed as survivance stories, according to Anishinaabe cultural theorist Gerald Vizenor.
INTERNATIONAL JOURNAL OF THE HISTORY OF SPORT
(2023)
Article
Education & Educational Research
Karen Martin, Madeleine Dobson, Kate Fitzgerald, Madeleine Ford, Stephan Lund, Helen Egeberg, Rebecca Walker, Helen Milroy, Keane Wheeler, Amanda Kasten-Lee, Lisa Bayly, Angela Gazey, Sarah Falconer, Monique Platell, Emily Berger
Summary: Recognition of the importance of trauma-informed schools is growing internationally, but there is a lack of consensus on the necessary components. This research developed internationally relevant trauma-informed principles for schools through a four-phase methodology involving expert input and a Delphi survey. The resulting 'International Trauma-Informed Practice Principles for Schools' provide clear guidance for creating appropriate learning environments for children impacted by trauma.
AUSTRALIAN EDUCATIONAL RESEARCHER
(2023)
Article
Hospitality, Leisure, Sport & Tourism
Rhiannon A. Campbell, Elizabeth J. Bradshaw, Nick Ball, Adam Hunter, Wayne Spratford
Summary: This study aimed to determine the inter-trial reliability of using IMeasureU Blue Thunder IMUs to assess upper and lower limb loading when performing foundation gymnastics skills, and investigate the effect of raw and filtered acceleration signals on reliability results. The study found that IMUs are reliable devices for measuring upper and lower limb loading in gymnastics.
INTERNATIONAL JOURNAL OF SPORTS SCIENCE & COACHING
(2021)
Article
Hospitality, Leisure, Sport & Tourism
Michael G. Sydney, Nick Ball, Dale Chapman, Martin Wollin, Jocelyn K. Mara
Summary: Competition standard and player position were found to have an influence on the physical demands of Australian elite youth male soccer players, with different positions showing varied performance levels at different competition standards. These findings can aid in the match-preparation of elite youth male soccer players in transitioning to higher levels of soccer.
INTERNATIONAL JOURNAL OF SPORTS SCIENCE & COACHING
(2021)