Training for specific events, like an archer practicing at 100 yards to improve accuracy at 50 yards, creates a non-linear improvement in proficiency.

“if you really want to be proficient at 50 yards with a bow and arrow practice at 100 and you'll be amazed at how simple 50 becomes and 60 and 70 and 80 it's a very nonlinear relationship in terms of accuracy with a bow and arrow”