Optimised force-velocity training during pre-season enhances physical performance in professional rugby league players     

Adam Simpson  Mark Waldron  Emily Cushion  Jamie Tallent 《Journal of sports sciences》2021,39(1):91-100

ABSTRACT

The effectiveness of 8-week force-velocity optimised training was assessed in highly trained professional rugby league athletes. Players (age 24 ± 3 years; body mass 94.9 ± 21.6 kg; height 181.3 ± 6.0 cm) were strength-matched and assigned to a force-velocity optimised group (OP; n = 15) or a general strength-power group (GP; n = 14). Tests included 10-m, 20-m sprints, 3 repetition-maximum squat and squat jumps over five load conditions to ascertain vertical force-velocity relationship. ANCOVA revealed there was a group effect for force-velocity deficit (P < 0.001), with the OP two-fold greater than the GP group (OP pre: 51.13 ± 31.42%, post: 62.26 ± 31.45%, GP pre: 33.00 ± 19.60%, post: 31.14 ± 31.45%, P < 0.001). There were further group effects for 3RM squat (OP pre: 151.17 ± 22.95 kg, post: 162.17 ± 24.16 kg, GP pre: 156.43 ± 25.07 kg, post: 163.39 ± 25.39 kg, P < 0.001), peak power (OP pre: 3195 ± 949 W, post: 3552 ± 1033 W, GP pre: 3468 ± 911 W, post: 3591 ± 936 W, P < 0.001), and SJ (OP pre: 39.79 ± 7.80 cm, post: 42.69 ± 7.83 cm, GP pre: 40.44 ± 6.23 cm, post: 41.14 ± 5.66 cm, P < 0.001). Prescribing F-V deficit training is superior for improving physical performance within highly trained RL players.  相似文献   

Australian society of archivists,diverse worlds,annual conference     

Mark Crookston 《档案与原稿》2018,46(2):237-238

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Validity and reliability of a linear positional transducer across commonly practised resistance training exercises     

Harry F. Dorrell  Joseph M. Moore  Mark F. Smith  Thomas I. Gee 《Journal of sports sciences》2019,37(1):67-73

This study investigated the validity and reliability of the GymAware PowerTool (GPT). Thirteen resistance trained participants completed three visits, consisting of three repetitions of free-weight back squat, bench press, deadlift (80% one repetition maximum), and countermovement jump. Bar displacement, peak and mean velocity, peak and mean force, and jump height were calculated using the GPT, a three-dimensional motion capture system (Motion Analysis Corporation; 150 Hz), and a force plate (Kistler; 1500 Hz). Least products regression were used to compare agreeability between devices. A within-trial one-way ANOVA, typical error (TE; %), and smallest worthwhile change (SWC) were used to assess reliability. Regression analysis resulted in R² values of >0.85 for all variables excluding deadlift mean velocity (R² = 0.54–0.69). Significant differences were observed between visits 3-2 for bench press bar displacement (0.395 ± 0.055 m; 0.383 ± 0.053 m), and deadlift bar displacement (0.557 ± 0.034 m; 0.568 ± 0.034 m). No other significant differences were found. Low to moderate TE (0.6–8.8%) were found for all variables, with SWC ranging 1.7–7.4%. The data provides evidence that the GPT can be used to measure kinetic and kinematic outputs, however, care should be taken when monitoring deadlift performance.  相似文献   

Christianity as public religion: a justification for using a Christian sociological approach for studying the social scientific aspects of sport     

Tom Gibbons  Nick J. Watson  Mark Mierzwinski 《Sport in Society》2019,22(2):209-223

Abstract

The vast majority of social scientific studies of sport have been secular in nature and/or have tended to ignore the importance of studying the religious aspects of sport. In light of this, a recent study has sought to encourage sociologists of sport not to divorce the ‘religious’ and the ‘sacred’ from their studies. In response to this call, the goal of the current essay is to explore how the conception of Christianity as ‘public religion’ can be utilized to help justify the use of a Christian sociological approach for studying the social scientific aspects of sport. After making a case for Christianity as public religion, we conclude that many of the sociological issues inherent in modern sport are an indirect result of its increasing secularization and argue that this justifies the need for a Christian sociological approach. We encourage researchers to use the Bible, the tools of Christian theology and sociological concepts together, so to inform analyses of modern sport from a Christian perspective.  相似文献   

What do we see out of the corner of our eye? The role of visual pivots and gaze anchors in sport     

Christian Vater  Andrew Mark Williams  Ernst-Joachim Hossner 《International review of sport and exercise psychology》2020,13(1):81-103

ABSTRACT

The role and importance of peripheral vision have been discussed across various sports. Yet, its functionality remains unclear and the terms employed in the literature to characterize the use of peripheral vision are not well defined. We present a review of 29 studies focusing on the use of peripheral vision in sports. We focus on the methodological approaches employed to study its use and identify the mechanisms that may underlie the effective use of peripheral vision in sport. We define key differences between ‘gaze anchors’ and ‘visual pivots’ and introduce the concept of a ‘foveal spot’. All three gaze behaviors, while being characterized by a consistent, dynamically adjustable gaze location, have different functionalities. A gaze anchor is a cue-optimized position used for the monitoring of peripheral cues and avoiding the negative consequences of saccades (i.e. information suppression), especially under time pressure. A visual pivot is a distance-optimized location between relevant cues which allows athletes to optimally initiate saccades to those cues, especially if the costs of eye-movements are low. A foveal spot is primarily used for information processing via the fovea. Finally, we highlight suggestions for future research to improve our understanding of the functional differences between these gaze behaviors.  相似文献   

A lesson in resilience: The abrupt digital transformation of society conferences in 2020     

Violaine Iglesias  Steven Rathgeb Smith  Dan Gibson 《Learned Publishing》2021,34(1):35-42

• The pandemic can be seen as an opportunity to revisit the justification for conferences and how they should be run to avoid elitism, climate impact, and diversity.
• 2020 saw a wealth of different approaches to events, including financing, technologies, scheduling, and the meaning of the term ‘live’.
• Engaging attendees and providing networking opportunities are considered the main obstacle to virtual events, but can social networking lessons help resolve – or even improve – this?
• It may take some time for online event programming to achieve the right balance of flexibility versus ‘buzz’ to meet a conference's key objectives: knowledge sharing and peer interaction.
• Live broadcasting is on the rise, but the on‐demand video model is gaining popularity as it ensures high‐quality presentation recordings and consistency of experience.
• Over time, technical challenges of online meetings will resolve, with competition leading to more reasonable pricing, customers becoming savvier, and vendors learning from experience.

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School systems as breeding grounds for shadow education: Factors contributing to private supplementary tutoring in West Bengal,India     

Pubali Ghosh  Mark Bray 《European Journal of Education》2020,55(3):342-360

In the academic literature, private supplementary tutoring is widely known as shadow education, in part because it is commonly indistinct and because much of its content mimics that in mainstream schooling. Around the world, shadow education has become an important part of students' lives and in some places it diminishes the body that it mimics. This paper builds on studies that have focused on relationships between schooling and shadow education. The paper uses the conceptual lens of privatisation-by-default, and employs qualitative methods to understand the roles of both government and private schools in promoting tutoring in West Bengal, India. It finds that substantial proportions of shadow education emanate from and are fostered by school systems. On the one hand private tutoring as a form of privatisation-by-default gives freedom of choice, but on the other hand it limits choice. Further, school-bred tutoring can have a negative backwash on school systems. As such, private supplementary tutoring is not just a neutral shadow but affects the body that it imitates. The study recommends researchers to look back at schools to gain a deeper understanding of private supplementary tutoring.  相似文献   

Sedentary Behavior Research Network members support new Canadian 24-Hour Movement Guideline recommendations     

Mark S. Tremblay  Scott Rollo  Travis J. Saunders 《运动与健康科学(英文)》2020,9(6):479-481

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If only it were all a game     

Silcox  Mark 《Metascience》2020,29(1):117-119

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Argument by Epithet     

Mark Bauerlein 《Academic Questions》2018,31(3):322-330

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