This is the 3685th most frequent Russian word.
тренировки
"Тренировки" means "training" or "workouts" in English.
Here, 'тренировками' is in the instrumental plural case, indicating activities of practicing or training.
Я занимаюсь тренировками каждый день.
I engage in workouts every day.
In this sentence, 'тренировки' is in the accusative plural case, referring to organized training sessions.
Для улучшения своих навыков я стараюсь посещать тренировки.
To improve my skills, I try to attend training sessions.
'Тренировки' is in the nominative plural case, used as the subject of the sentence, referring to the concept of exercising or training.