Why Rugby Players DONT Need to do 8-12 Reps to Gain Muscle (Hypertrophy Rep Range)

The question cam through:

"I am a rugby player obviously and I practice in phases . So right now I am in Phase one which is hypertrophy. And sometimes I don’t know how many reps I should do. I know hypertrophy is between 8-12 reps. So when should I do 8 and When 10 , 12? 
There are some exercises like pull ups that I can’t do 12 repetitions of yet ."

This podcast is the full answer.

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