KIRK, C., CLARK, D.R., LANGAN-EVANS, C. and MORTON, J.P. 2020. The physical demands of mixed martial arts: a narrative review using the ARMSS model to provide a hierarchy of evidence. Journal of sports science [online], 38(24), pages 2819-2841. Available from: https://doi.org/10.1080/02640414.2020.1802093