Rugby Science Update 2

Comparison of Weightlifting, Traditional Resistance Training and Plyometrics on Strength, Power and Speed: A Systematic Review with Meta-Analysis

This review aimed to explore whether weightlifting resulted in greater improvements in measures of strength, power, speed and change of direction speed compared with traditional resistance training, plyometric training or controls. Findings from 16 studies suggested there are moderate to large benefits of weightlifting for improvements in strength, counter movement jump, squat jump and speed performance when compared with no additional training beyond sports practice or typical physical activities. Whilst improvements in strength were found to be similar following both weightlifting and traditional resistance training, weightlifting may be superior for improvements in weightlifting performance (i.e. load lifted) and counter movement jump height. Factors such as population characteristics or programme design may also influence these outcomes.

This article is open access and the full article is free to download.

Morris, S. J., Oliver, J. L., Pedley, J. S., Haff, G. G., & Lloyd, R. S. (2022). Comparison of Weightlifting, Traditional Resistance Training and Plyometrics on Strength, Power and Speed: A Systematic Review with Meta-Analysis. Sports Medicine, 1-22.

What Learning Environments Help Improve Decision-Making?

This study attempted to provide a greater understanding of coaches’ perceptions and strategies for specifically developing on-ball decision-making abilities in players. In the paper, the authors were interested in what strategies coaches believe would improve player decision-making, how they would create a learning environment to specifically train decision-making, and how this may influence the on-ball decision-making opportunities for the players.

The study found coaches are aware of the strategies which may promote decision-making opportunities for players such as the use of questioning, constraints-led pedagogy and using Playing Form rather than Training Form activities. While the data may suggest coaches are aware of potential strategies to promote player decision-making and are attempting to move away from traditional coaching approaches, the findings provide evidence to suggest that coaches still over-coach, with high amounts of instruction and a very stop-start nature to the activity. This coaching practice potentially limits the problem-solving and decision-making demands on players. The findings support researchers who indicate there is still a disconnect between intention and practice, with the application of more effective coaching methods proposed in the research still a challenge to implement for coaches.

O’Connor, D., Larkin, P., & Williams, A. M. (2017). What learning environments help improve decision-making?. Physical Education and Sport Pedagogy, 22(6), 647-660.

Characteristics of Complex Systems in Sports Injury Rehabilitation: Examples and Implications for Practice

This review applies the complex systems approach to return to sport. The paper highlights the characteristics and terminologies of complex systems, using a case of anterior cruciate ligament injury rehabilitation. Alternative forms of scientific inquiry, such as the use of computational and simulation-based techniques, are also discussed—to move the complex systems approach from the theoretical to the practical level.

This article is open access and the full article is free to download.

Yung, K. K., Ardern, C. L., Serpiello, F. R., & Robertson, S. (2022). Characteristics of complex systems in sports injury rehabilitation: examples and implications for practice. Sports Medicine-Open, 8(1), 1-15.

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