Article
Sport Sciences
Ross J. Brosnan, Greig Watson, Will Stuart, Craig Twentyman, Cecilia M. Kitic, Matthew Schmidt
Summary: This study investigates the validity, reliability, and agreement of three commonly used GPS units in applied and research settings. The results show good performance in distance and speed, but caution is needed in acceleration indices.
JOURNAL OF STRENGTH AND CONDITIONING RESEARCH
(2022)
Review
Food Science & Technology
Hiroki Anzai, Masahiko Hirata
Summary: Individual monitoring of animal behavior is essential for enhancing productivity and welfare in a group setting. In small-scale intensive grazing systems, monitoring all animals in the herd is feasible and cost-effective, allowing for individually tailored management to meet the needs of each animal.
FRONTIERS IN SUSTAINABLE FOOD SYSTEMS
(2021)
Article
Astronomy & Astrophysics
Christopher W. Johnson, Nicholas Lau, Adrian Borsa
Summary: The study found discrepancies in GPS station velocity estimates among different analysis centers, with vertical differences being more significant. Actual velocity uncertainties are often underestimated in the horizontal direction and may be over or underestimated in the vertical direction. Subsidence rates vary widely in different regions, with station density having a modest impact on uncertainties.
EARTH AND SPACE SCIENCE
(2021)
Article
Sport Sciences
Alice R. Busbridge, Michael J. Hamlin, James A. Jowsey, Mark H. Vanner, Peter D. Olsen
Summary: This study aimed to investigate the running demands of high-level female players in the New Zealand Provincial Rugby Competition. The study found that forwards and backs covered a similar total distance and running distance, but there were significant differences within specific playing positions. Halfbacks recorded higher running distances and overall distance than other positions, while outside backs did less running and had the lowest distance for high-intensity running in the backs. The study suggests the development of training and speed zone bands specific to female players due to the unique demands of women's rugby.
JOURNAL OF STRENGTH AND CONDITIONING RESEARCH
(2022)
Article
Engineering, Civil
Bin Zhang, Yanxiang Yu, Xiaojun Li, Mianshui Rong, Juke Wang
Summary: The study compared and analyzed the consistency of observed acceleration and velocity data recorded by accelerometer and seismometer, showing good agreement in medium-frequency bands and medium- and far-fields. Weighted ratios proposed for the research dataset of ground motion prediction equations were found to be reasonable and reliable, applicable to southwest China.
JOURNAL OF EARTHQUAKE ENGINEERING
(2022)
Article
Mechanics
Qiang Xiao, Remy Mevel, Stany Gallier, Matei I. Radulescu
Summary: The present work proposes a novel curved ray-tracking algorithm to track stream tubes with curved shock fronts. The proposed methods demonstrate significantly higher convergence rates compared to typical straight-ray methods. The validity of the methods is validated through experimental comparisons and the range of time resolution required for reliable results is determined. The analysis of ray dynamics in weakly unstable detonations further supports the effectiveness of the proposed methods.
Article
Engineering, Mechanical
Liangxin Yuan, Yuan Wang, Peng Du, Xiaomin Lian
Summary: This paper investigates the importance of fusing GPS course angle (GCA) in vehicle velocity estimation based on low-cost GPS/IMU from the perspective of system observability. The research shows that incorporating GCA leads to improved accuracy in velocity estimation, particularly in scenarios where the observability of the yaw angle is weak.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART D-JOURNAL OF AUTOMOBILE ENGINEERING
(2022)
Article
Astronomy & Astrophysics
Xinhua Chen, Hongmei Zhang, Jianhu Zhao, Wenbiao Liang, Jie Feng
Summary: The study proposes two positioning methods utilizing an iteration to obtain accurate incident angle and coordinates of an underwater transponder. The proposed algorithms are verified through simulated and practical experiments, achieving significantly improved positioning accuracy compared to the ordinary sailing-circle method.
EARTH AND SPACE SCIENCE
(2021)
Article
Economics
Zeynep S. Akinci, Oriol Marquet, Xavier Delclos-Alio, Carme Miralles-Guasch
Summary: Immobility and lack of physical activity are common problems among seniors. This study examines how urban vitality affects seniors' outdoor rest and finds that seniors in Barcelona tend to rest rather than being active in more vital areas, with variations among age and gender groups.
JOURNAL OF TRANSPORT GEOGRAPHY
(2022)
Article
Engineering, Aerospace
Rebecca McGirr, Paul Tregoning, Sebastien Allgeyer, Herb McQueen, Anthony Purcell
Summary: The study significantly improves the accuracy of orbit modeling and gravity field estimation by filtering the accelerometer observations to correct for temperature-induced drifts.
ADVANCES IN SPACE RESEARCH
(2022)
Article
Sport Sciences
Nathan P. Dawkins, Tom Yates, Charlotte L. Edwardson, Ben Maylor, Melanie J. Davies, David Dunstan, Patrick J. Highton, Louisa Y. Herring, Kamlesh Khunti, Alex Rowlands
Summary: This study introduced a novel data-driven method to summarize accelerometer data and compared physical activity profiles in three different groups. The results revealed that average acceleration and MVPA were lower in the group with chronic diseases, while intensity distributions were poorer in both groups with chronic diseases and post-gestational diabetes compared to office-workers. Different groups also showed variations in accumulating brisk walking time per day. These data-driven methods identified differences in activity aspects between groups that may not be captured by cut-point methods alone.
JOURNAL OF SPORTS SCIENCES
(2021)
Article
Environmental Sciences
Weronika Magiera, Inese Varna, Ingus Mitrofanovs, Gunars Silabrieds, Artur Krawczyk, Bogdan Skorupa, Michal Apollo, Kamil Maciuk
Summary: The objective of this research was to study the accuracy of GNSS code receivers under poor sky visibility conditions. Measurements were conducted on three different objects using smartphones and handheld receivers. The results showed that measuring near high trees significantly affected the accuracy of both geodetic equipment and code receivers. Better results were observed with mobile phones for point positioning, while handheld receivers achieved higher accuracy during motion measurements. Additionally, it was found that handheld receivers may achieve better accuracy and reliability compared to smartphones.
Article
Public, Environmental & Occupational Health
Kwadwo A. Boakye, Ofer Amram, John M. Schuna, Glen E. Duncan, Perry Hystad
Summary: This study examines the impact of different built environment characteristics on physical activity, finding that features such as NDVI, parks, and blue space are associated with increased odds of physical activity. On the other hand, traffic air pollution and noise are associated with decreased odds of physical activity.
Article
Environmental Sciences
Ahmed Elaksher, Tarig Ali, Abdullatif Alharthy
Summary: Airborne laser scanning sensors can collect a large number of 3D topographic points quickly, providing high-resolution depictions of complex objects. This research presents a detailed evaluation of LIDAR system and quantifies the quality of LIDAR data, an aspect often overlooked in published studies. Field surveying is used to evaluate the planimetric and height accuracy of the LIDAR data. The average elevation discrepancy is 0.12 m, and the RMSE of horizontal offsets is approximately 0.50 m. The height discrepancies have both random short-period variations and biases from the geo-positioning system.
Article
Multidisciplinary Sciences
Roland van den Tillaar
Summary: The study compared step-by-step kinematics of normal and assisted 60 m sprints with different loads in experienced sprinters. Results showed that increasing assisted loads led to faster times, with longer step lengths and shorter contact times being key factors. Women exhibited a more pronounced effect from the assisted loads, achieving larger decreases in sprint times and greater increases in maximal step velocity compared to men, mainly due to shorter contact times and increased step lengths.
Article
Sport Sciences
Kellyanne J. Redman, Logan Wade, Ryan Whitley, Mark J. Connick, Vincent G. Kelly, Emma M. Beckman
Summary: This study examined the relationship between tackle outcomes and strength and power qualities in professional rugby league. The results showed significant associations between play-the-ball speed and vertical power, post-contact distance and upper-body power, losing the play-the-ball contest in defense and horizontal power, and ineffective tackles and concentric impulse. These findings suggest the importance of developing and maintaining full-body power for positive tackle outcomes in professional rugby league.
JOURNAL OF STRENGTH AND CONDITIONING RESEARCH
(2022)
Article
Sport Sciences
Suzanna Russell, David G. Jenkins, Shona L. Halson, Laura E. Juliff, Vincent G. Kelly
Summary: The study shows that mental fatigue negatively influences physical, technical, and tactical aspects of sporting performance. International netballers experience varying levels of mental fatigue across training and competition periods, suggesting the need to monitor and manage mental fatigue during training and competition preparation.
EUROPEAN JOURNAL OF SPORT SCIENCE
(2022)
Article
Sport Sciences
Rick A. Dann, Vincent G. Kelly
Summary: This article provides strategies for strength and conditioning interventions for snowboarding athletes, addressing unique considerations such as cultural qualities, injury prevention, unstable surface training, skill acquisition, and recovery strategies.
STRENGTH AND CONDITIONING JOURNAL
(2022)
Editorial Material
Physiology
Bart Roelands, Vincent Kelly, Suzanna Russell, Jelle Habay
INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE
(2022)
Article
Physiology
Suzanna Russell, David G. Jenkins, Shona L. Halson, Laura E. Juliff, Mark J. Connick, Vincent G. Kelly
Summary: This study assessed changes in mental fatigue and its relationship with other measures of athlete well-being. It found significant fluctuations in mental fatigue among professional team-sport athletes across two seasons, and that mental fatigue differed from physical fatigue, tiredness, stress, mood, and motivation. These findings highlight the importance of monitoring mental fatigue as an independent measure and implementing strategies to manage its impact on performance.
INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE
(2022)
Article
Physiology
Kellyanne J. Redman, Logan Wade, Vincent G. Kelly, Mark J. Connick, Emma M. Beckman
Summary: This study aimed to predict tackle outcomes in professional rugby league based on strength and power principal components. The results showed that strength component was a significant predictor of play-the-ball speed in attack, while power component was a significant predictor of postcontact meters. These findings suggest that training and testing these components may improve players' tackling performance during competition.
INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE
(2022)
Article
Sport Sciences
Tannath J. Scott, Shaun J. McLaren, Ric Lovell, Macfarlane T. U. Scott, Steve Barrett
Summary: This study aimed to assess the reliability, validity, and sensitivity of an individualised sub-maximal fitness test in elite rugby league players. The results showed that the test was reliable and valid for assessing fitness, with only heart rate showing sensitivity to acute changes in training load.
JOURNAL OF SPORTS SCIENCES
(2022)
Article
Physiology
Suzanna Russell, Shona L. Halson, David G. Jenkins, Steven B. Rynne, Bart Roelands, Vincent G. Kelly
Summary: The study found that elite sport coaches experience elevated mental fatigue during the preseason training period, which may have negative impacts on their performance. These coaches also exhibited changes in markers of psychobiological stress. Therefore, it is important to consider management and mitigation strategies for mental fatigue among elite coaches.
INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE
(2023)
Article
Physiology
Tzlil Shushan, Dean Norris, Shaun J. McLaren, Martin Buchheit, Tannath J. Scott, Steve Barrett, Antonio Dello Iacono, Ric Lovell
Summary: The purpose of this study was to survey team-sport practitioners on their current practices and perceptions of submaximal fitness tests (SMFTs). A total of 66 practitioners from 24 countries completed an online survey, and the results showed that time-efficiency and nonexhaustive nature were considered the most important features of implementing SMFTs. The survey provides insights into the methodological frameworks, practices, and challenges of SMFTs in team sports. Rating: 8 out of 10.
INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE
(2023)
Article
Hospitality, Leisure, Sport & Tourism
Patrick M. Holmberg, Scott Russell, Katherine A. O'Brien, Lachlan P. James, Vincent G. Kelly
Summary: This study explores the perceptions of practitioners regarding the application of priming exercise and identifies the challenges and contextual factors influencing its use.
INTERNATIONAL JOURNAL OF SPORTS SCIENCE & COACHING
(2023)
Article
Sport Sciences
Lewis A. Fazackerley, Geoffrey M. Minett, James D. Clark, Vincent G. Kelly
Summary: This study aimed to explore the perceptions of elite NRL players and staff on the annual training and competition calendar from a player workload and well-being perspective. The findings showed that NRL players and staff believe players are comfortable with the current number of games but are already at their maximum capacity. The study also identified minority groups that may need support to enhance player well-being.
SPORTS MEDICINE-OPEN
(2023)
Article
Sport Sciences
Patrick M. M. Holmberg, Peter W. W. Harrison, David G. G. Jenkins, Vincent G. G. Kelly
Summary: Priming exercises before competition are popular for improving subsequent performance, but studies have shown inconsistent results. The variations in findings may be due to different variables used in the research and individual characteristics. This review aims to examine the available evidence and identify the key variables that determine if priming exercises involving resistance and stretch-shortening cycle exercises can enhance performance within 48 hours. Recommendations based on the current evidence and directions for future research are provided.
STRENGTH AND CONDITIONING JOURNAL
(2023)
Review
Sport Sciences
Tzlil Shushan, Ric Lovell, Martin Buchheit, Tannath J. Scott, Steve Barrett, Dean Norris, Shaun J. McLaren
Summary: This study provides evidence that submaximal fitness test heart rate is a reliable and valid indicator of endurance performance in team sport athletes. The measurement properties of heart rate are not influenced by the test protocol or athlete characteristics.
SPORTS MEDICINE-OPEN
(2023)
Article
Physiology
Tzlil Shushan, Ric Lovell, Shaun J. McLaren, Steve Barrett, Martin Buchheit, Tannath J. Scott, Dean Norris
Summary: This study examined the test-retest reliability of submaximal fitness test (SMFT) outcome measures derived from different protocols and analytical techniques. The results showed that exercise heart rate, vertical PlayerLoad, and contact time had the highest degrees of reliability, regardless of the SMFT protocol or analytical approach.
INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE
(2023)
Article
Physiology
Johnpaul Caia, Shona L. Halson, Patrick M. Holmberg, Vincent G. Kelly
Summary: This study found that evening competition disturbs sleep in rugby league athletes, leading to delayed bedtime and reduced sleep duration. Additionally, caffeine supplementation before and during competition results in substantial increases in postcompetition salivary caffeine concentration.
INTERNATIONAL JOURNAL OF SPORTS PHYSIOLOGY AND PERFORMANCE
(2022)