Every sport is going to be challenging in different ways, the physical demands of a long-running marathon are different from those of a football game where it needs burst of energy. But with that in mind, how do we work out which is the most challenging sport? Thanks to the fine people at Paddy Power Betting, we’ve got this infographic that goes over some of the most testing sports out there and gives some thought into what earns the title of most testing. Some of the factors to bear in mind are things like the total number of calories burned when engaging in the sport, the high risk of injury and the sheer physical demands of the sport in terms of strength, agility and pure stamina. With that in mind, this list is less ‘easiest to hardest’ and more a tiering of difficulty based on performance.