Английский словарь американских идиом - hit one's stride

{v. phr.} 1. To walk or run at your best speed; reach your top speed or game. * /After walking the first mile, Jim was just hitting his stride./ * /The horse began to hit his stride and moved ahead of the other horses in the race./ 2. To do your best work; do the best job you are able to. * /Mary didn't begin to hit her stride in school until the fifth grade./