Manchester Metropolitan University's Research Repository

    Maximum running intensities during English academy rugby union match-play

    Read, D ORCID logoORCID: https://orcid.org/0000-0001-6367-0261, Till, K, Beasley, G, Clarkson, M, Heyworth, R, Lee, J, Weakley, J, Phibbs, P, Roe, G, Darrall-Jones, J and Jones, B (2018) Maximum running intensities during English academy rugby union match-play. Science and Medicine in Football, 3 (1). pp. 43-49. ISSN 2473-4446

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    Purpose: To quantify and compare the maximum running intensities during rugby union match-play. Methods: Running intensity was quantified using micro-technology devices (S5 Optimeye, Catapult) from 202 players during 24 matches (472 observations). Instantaneous speed was used to calculate relative distance (m·min-1) using a 0.1 s rolling mean for different time durations (15 and 30 s and 1, 2, 2.5, 3, 4, 5, and 10 min). Data were analysed using a linear mixed-model and assessed with magnitude-based inferences and Cohen’s d effect sizes (ES). Results: Running intensity for consecutive durations (e.g., 15 s vs. 30 s, 30 s vs. 1 min, etc.) decreased as time increased (ES = 0.48-2.80). Running intensity was lower in forwards than backs during all durations (-0.74 ±0.21 to -1.19 ±0.21). Running intensity for the second row and back row positions was greater than the front row players at all durations (-0.58 ±0.38 to -1.18 ±0.29). Running intensity for scrum-halves was greater (0.46 ±0.43 to 0.86 ±0.39) than inside and outside backs for all durations besides 15 and 30 s. Conclusions: Front rowers and scrum-halves were markedly different from other sub-positional groups and should be conditioned appropriately. Coaches working in academy rugby can use this information to appropriately overload the intensity of running, specific to time durations and positions.

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