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Alexandra M. Coates, Jordan A. Berard, Trevor J. King, and Jamie F. Burr

Predicting ultramarathon running performance is a unique challenge, as ultramarathon races can vary greatly in distance, duration, and physiological demand. Ultramarathon running races range from any race exceeding the marathon distance (>42.2 km) to multiday events and commonly include diverse

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Simon J. de Waal, Josu Gomez-Ezeiza, Rachel E. Venter, and Robert P. Lamberts

field tests, including various maximal and submaximal aerobic tests, 4 have been used to identify and analyze road running performance parameters. Recently, having considered the differences between road and trail running, Ehrström et al 1 have questioned whether it is appropriate to apply the

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Wassim Moalla, Mohamed Saifeddin Fessi, Sabeur Nouira, Alberto Mendez-Villanueva, Valter Di Salvo, and Said Ahmaidi

the mesocycle duration and tapering strategies on the physical performance of professional soccer teams has not yet been investigated, and to the best of our knowledge, no study has been published on how mesocycles’ duration might impact match running performance. The present study aimed to

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Peter J. Whalley, Chey G. Dearing, and Carl D. Paton

average chance of effectiveness was 97% for all treatments combined. Table 1 Comparison of 5-km Running Performance, Time Heart Rate, and Perceived Exertion, Mean (SD) Treatment 5-Km time, min:s Heart rate, bpm Rate of perceived exertion Familiarization (F) 20:46 (3:12) 163 (13) 16.6 (0.8) Placebo (P) 20

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Georgia M. Black, Tim J. Gabbett, Richard D. Johnston, Geraldine Naughton, Michael H. Cole, and Brian Dawson

the inevitable decline in running performance across AF matches, the effectiveness of on-field playing time per rotation has recently been investigated. 2 Specifically, following 5 minutes, relative distances declined and continued in this pattern until the 9-minute mark of a playing period. 2

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Jonne A. Kapteijns, Kevin Caen, Maarten Lievens, Jan G. Bourgois, and Jan Boone

 × 15-minute game, especially with regard to the differences among the positions on the field. Given these differences in match running performance between the positions, differences in performance profiles, determined from a test battery, also would have been expected among the positions. However, this

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Andrew J. Carnes and Sara E. Mahoney

The improvement of distance-running performance has inspired decades of scientific research and debate. Current data support the concept of “polarized endurance training” (POL), characterized by a high volume of continuous, low-intensity training interspersed with a small amount at much higher

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Volker Scheer, Tanja I. Janssen, Solveig Vieluf, and Hans-Christian Heitkamp

and exercise testing strategies to predict performance and improve training concepts and competition results. Values that are classically used to predict running performance include maximal oxygen uptake (VO 2 max), percentage of VO 2 max, ventilatory and lactate thresholds, and running economy. 1

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Michal Botek, Jakub Krejčí, Andrew J. McKune, and Barbora Sládečková

athletes, because a possible negative correlation ( r  = −.54) between RT differences and pooled RT was found. Specifically, prerace hydration with 1680-mL HRW compared with placebo likely improved endurance running performance by 1.3% in the slowest runners, whereas the effect of HRW on race performance

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Philip Hurst, Samantha Saunders, and Damian Coleman

determine the effect of dietary nitrate in the form of beetroot juice on sport performance during a competitive time trial using a sufficiently large sample. We used parkrun ® as our time-trial event, which has shown to be a highly reliable measure of 5-km running performance (coefficient variation [CV