University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Positional differences in running and nonrunning activities during elite American Football Training

Ward, P.A., Ramsden, S., Coutts, A.J., Hulton, A.T. and Drust, B. (2018) Positional differences in running and nonrunning activities during elite American Football Training Journal of Strength and Conditioning Research, 32 (7). pp. 2072-2081.

Ward (2017) - Positional Differences in Running and Non-Running Activities During Elite American Football Training - J Strength Cond Res.pdf - Accepted version Manuscript

Download (1MB) | Preview


The aim of this investigation was to describe differences in training loads between position groups within professional American football. Integrated micro technology data were collected on 63 NFL football players during an American football training camp. Five key metrics (total distance, high-speed distance, player load (PL), PL per minute, and total inertial movement analysis [IMA]) served to quantify both running and nonrunning activities. Players were classified into position groups (defensive back [DB], defensive linemen [DL], linebacker, offensive linemen [OL], quarterback, running back, tight end, and wide receiver [WR]). Training sessions were identified by their relationship to the upcoming match (e.g., -4, -3, and -2). Running and nonrunning activities varied between position groups relative to the training day. Differences in total distance between DB and WR were observed to be unclear across the 3 training days (game day [GD] -4: 74 ± 392 m; GD -3: 2122 ± 348 m; and GD -2: 2222 ± 371 m). However, moderate to large differences were observed between these 2 positions and the other positional groups. A similar relationship was observed in PL and PL per minute, with the DB and WR groups performing greater amounts of load compared with other positional groups. Differences in high-speed distance varied across positional groups, indicating different outputs based on ergonomic demands. The OL and DL groups ran less but engaged in a higher amount of nonrunning activities (total IMA) with differences ranging from moderate to large across the 3 training days. Total IMA differences between offensive and defensive linemen were unclear on GD -4 (24 ± 9) and GD -2 (22 ± 8) and likely moderate on GD -3 (29 ± 9). Positional differences with regard to running and non-running activities highlight the existence of position-specific training within a training microcycle. In addition, total IMA provides a useful metric for quantifying sport-specific movements within the game of American football. © 2017 National Strength and Conditioning Association.

Item Type: Article
Divisions : Faculty of Health and Medical Sciences > School of Biosciences and Medicine
Authors :
Ward, P.A.
Ramsden, S.
Coutts, A.J.
Drust, B.
Date : July 2018
DOI : 10.1519/JSC.0000000000002294
Copyright Disclaimer : © 2017 National Strength and Conditioning Association.
Uncontrolled Keywords : Accelerometer, Collision-based sport, GPS, Training load, adult, athletic performance, football, geographic information system, human, male, physiology, running, United States, young adult, Adult, Athletic Performance, Football, Geographic Information Systems, Humans, Male, Running, United States, Young Adult
Depositing User : Diane Maxfield
Date Deposited : 09 Sep 2019 14:21
Last Modified : 09 Sep 2019 14:21

Actions (login required)

View Item View Item


Downloads per month over past year

Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800