Whats the possibility of james having endurance thershold too?

Compared to james other stats his durability is his weakest stat james shouldve definitely did something to increase his durability

https://preview.redd.it/vct8a2gkp2me1.jpg?width=479&format=pjpg&auto=webp&s=5c5707e48a7bf5d4165e4724480445b44c789a05

https://preview.redd.it/o0a2s3gkp2me1.jpg?width=356&format=pjpg&auto=webp&s=e637d5977391216004efcf8f355e1da829798011

James after fighting gone to training , he saying he set a goal for his body maybe thats why kitae helped him in this ? as kitae has kinda high ap and already has endurance thershold he couldve helped james in obtaining this ?