WhodatWhoadi
Naw
Man for all the times I clown on soccer yall dudes transition well into combat sports well. Usually have good cardio (like you said) and good reflexes. I know Sergio was highly into now is a boxing champ, I know there is a few others who escape my mine. Also in mma them b*stards who had a soccer background can throw some damn kicks lol.i did it as a kid....i did it along with playing soccer so my cardio was up to par to handle it in the beginning....
Usually the foreign fighters might have a background in it.