This is the 3831st most frequent Russian word.
sport
Sport: Physical activities or games aimed at competition, fitness, or recreation.
Here, "спорт" is used to refer broadly to physical activities or disciplines aimed at competition, fitness, or recreation.
Я люблю спорт с детства.
I have loved sports since childhood.
Here, "спорт" refers to a course or institutional category focusing on exercise and physical training.
В университете у нас был обязательный предмет спорт.
In university, we had a required subject, physical education.
In this case, "спорт" is used as part of a phrase to specify a particular kind or category of athletic activity.