Beenham, M., Barron, D., Fry, J., Hurst, H., Figueiredo, A., & Atkins, S. (2017). A comparison of GPS workload demands in match play and small-sided games by the positional role in youth soccer. Journal of Human Kinetics, 57(1), 129-137. https://doi.org/10.1515/hukin-2017-0054