“…Increasingly, the Tegner Activity Scale is used as selfreported by patients, [12,16,19,31] and several recent publications did not describe the collection mode. [4,5,10,15,17,18,29] We could however not find any study supporting the use of the Tegner Activity Scale as a self-reported outcome. Football is represented at three different levels of this scale: 10 is equivalent to national level; 9 to competitive level; and 7 to recreational level.…”