Examples of using "упражнялся" in a sentence and their english translations:
He exercised.
Tom practiced in front of the mirror.
When was the last time you exercised?
I heard you practicing the piano.
He practiced every day at home.
Tom practiced the piano every day when he was in high school.
Yesterday was the first time in a long time that I really worked out, so all the muscles in my body ached when I woke up this morning.