godan verb (-mu), intransitive verb
run into; dash into
Describes running into a room, building, or enclosed space. Often implies a sudden or hurried entry.
彼は急に部屋に走り込んだ。
He suddenly ran into the room.
雨が降り出したので、近くのカフェ
It started raining, so I dashed into a nearby café.
godan verb (-mu), intransitive verb
do long training runs; put in mileage
Used in sports contexts, especially for distance running or conditioning. Implies sustained running as part of training.
マラソンに向けて毎日10キロ走り込んでいる。
I'm putting in 10 kilometers every day in preparation for the marathon.