level of the subjects monitored. Players in this study were competing in a state-wide competition and as such likely traveled less distance during away games than team sport players monitored in other studies 27 , 28 competing at the national level. In national competitions, longer travel distances are
Jordan L. Fox, Robert Stanton, Charli Sargent, Cody J. O’Grady and Aaron T. Scanlan
Benjamin G. Serpell, Joshua Strahorn, Carmen Colomer, Andrew McKune, Christian Cook and Kate Pumpa
cortisol and performance in team sports 1 , 4 ; however, none has examined the effects of physical and psychosocial treatments on testosterone and cortisol in a cohort of the same players in an elite team sport environment. The purpose of this study was to examine the effect of physical and psychosocial
Greg Doncaster, John Iga and Viswanath Unnithan
is a paucity of research to date that has examined differences in RE between individuals of different maturity status, particularly in team sport athletes. Segers et al ( 34 ) reported no differences in the oxygen cost [expressed in absolute terms, using allometric scaling ( b = 0.59) or as a %VO 2
Jonathan P. Norris, Jamie Highton and Craig Twist
Perform . 2016 ; 11 : 311 – 318 . doi:10.1123/ijspp.2015-0243 10.1123/ijspp.2015-0243 26219106 27. Waldron M , Highton J . Fatigue and pacing in high-speed intermittent team sport: an update . Sports Med . 2014 ; 44 : 1645 – 1658 . doi:10.1007/s40279-014-0230-6 10.1007/s40279-014-0230-6 28
Ryan M. Chambers, Tim J. Gabbett and Michael H. Cole
.1080/02640414.2016.1252051 10.1080/02640414.2016.1252051 22. Wundersitz D , Josman C , Gupta R , Netto K , Gastin P , Robertson S . Classification of team sport activities using a single wearable tracking device . J Biomech . 2015 ; 48 ( 15 ): 3975 – 3981 . PubMed ID: 26472301 doi:10.1016/j.jbiomech.2015
Heidi R. Thornton, Jace A. Delaney, Grant M. Duthie and Ben J. Dascombe
To investigate the ability of various internal and external training-load (TL) monitoring measures to predict injury incidence among positional groups in professional rugby league athletes.
TL and injury data were collected across 3 seasons (2013–2015) from 25 players competing in National Rugby League competition. Daily TL data were included in the analysis, including session rating of perceived exertion (sRPE-TL), total distance (TD), high-speed-running distance (>5 m/s), and high-metabolic-power distance (HPD; >20 W/kg). Rolling sums were calculated, nontraining days were removed, and athletes’ corresponding injury status was marked as “available” or “unavailable.” Linear (generalized estimating equations) and nonlinear (random forest; RF) statistical methods were adopted.
Injury risk factors varied according to positional group. For adjustables, the TL variables associated most highly with injury were 7-d TD and 7-d HPD, whereas for hit-up forwards they were sRPE-TL ratio and 14-d TD. For outside backs, 21- and 28-d sRPE-TL were identified, and for wide-running forwards, sRPE-TL ratio. The individual RF models showed that the importance of the TL variables in injury incidence varied between athletes.
Differences in risk factors were recognized between positional groups and individual athletes, likely due to varied physiological capacities and physical demands. Furthermore, these results suggest that robust machine-learning techniques can appropriately monitor injury risk in professional team-sport athletes.
Live S. Luteberget, Benjamin R. Holme and Matt Spencer
, the technology can detect important activities and facets of the play. 10 – 12 There are several different manufacturers of IMUs (integrated with GPS) designed for monitoring team sport athletes, including Catapult Sports (MinimaxX and OptimEye; Melbourne, Australia), VX Sports (VX; Lower Hut, New
Callum J. McCaskie, Warren B. Young, Brendan B. Fahrner and Marc Sim
Australian football (AF) is a field-based team sport requiring various elements of physical fitness. 1 – 3 A typical match lasts around 120 minutes, played over 4 quarters 4 where players cover around 11 to 14 km. 5 To compete at this level, professional AF players undertake rigorous preseason
Patrick G. Campbell, Jonathan M. Peake and Geoffrey M. Minett
implement a high volume of repeated sprint scenarios in training based on evidence that repeat sprint ability is an important quality for team sport performance. 23 These findings demonstrate the need for more research providing comparisons between matches and training. Training approaches aim to develop
Helmi Chaabene, Yassine Negra, Jason Moran, Olaf Prieske, Senda Sammoud, Rodrigo Ramirez-Campillo and Urs Granacher
an inertial device on CMJ performance in young male team sport players. Findings demonstrated that both training interventions generated a small CMJ performance improvement (ES = 0.28 for the unilateral-squat group and 0.42 for the bilateral-squat group). However, these results cannot be directly