This is the 4764th most frequent Russian word.
занимаются
"Are engaged in" or "are involved in."
Here, 'занимаются' means 'engage or practice', specifically indicating participation in sports activities.
Они занимаются спортом каждый день.
They practice sports every day.
In this context, 'занимаются' is used to express 'studying or working on', related to academic preparation.
Ученики занимаются уроками перед экзаменом.
The students are studying their lessons before the exam.
The phrase uses 'занимаются' to mean 'put effort into engaging or activity', here related to art and crafts.