You really should get more exercise.
Swimming is my favorite form of exercise.
I do stomach exercises most days.
I can also [get some] exercise with the bicycle. (Key English Test; A2; Bengali)
The book has exercises at the end of every chapter.
It's a new book and it has all [the] nece[s]sary exercises for secondary school. (Key English Test; A2; Spanish)
The cadets are out on military exercises.
I am not opposed to military exercises, but such a noisy activity cannot be tolerated in a world in which environmental protection should be promoted by everybody, [including] the army. (Certificate of Proficiency in English; C2; German)
She exercises most evenings, usually by running.
A work-out in the gym can exercise all the major muscle groups.
It's funny how I heard about that; I was at the gym with Sarah, we were exercising when we heard Tom talking about it with John. (Preliminary English Test; B1; Italian)
You should always exercise your right to vote.
However, if you believe that nothing can be done, I have to inform you that we will exercise our legal rights and take action against you. (Certificate of Proficiency in English; C2; Dutch)