When I was age 12, I did about 300-500 finger power actions with racket cover on.

当我12岁的时候，我经常用包着拍套的球拍做300 - 500次手指的力量练习。

youdao

At the time the consumer organisation Citizens Advice dubbed the sale of PPI policies a "protection racket", saying they were often too expensive and failed to provide the level of cover that customers thought they were getting.

BBC: Car dealers fined over insurance