The phrase "a boxing class" is correct and usable in written English.
You can use it when referring to a specific type of fitness or martial arts class focused on boxing techniques and training.
Example: "I signed up for a boxing class to improve my fitness and learn self-defense skills."
Alternatives: "a boxing lesson" or "a boxing session".
At the moment it's sometimes more useful all round if I just to go to a boxing class instead!
My mum used to do an aerobics class and she couldn't get a babysitter one night so she took us [Nicola and her brother, Kurtis] down to the gym, which had a boxing class on at the same time.
(Kumbaya, my Lord?) Thoroughly exhausted from watching other people exercise, I made my way past the Pilates studio and a boxing class to the office of Vicki Poth, the director of spa operations.
He is a public relations consultant and freelance writer who teaches a writing class at Urban College of Boston and a boxing class at Gold's Gym in South Boston.
It didn't help that he'd taken a boxing class that morning.
He later added a boxing class to fill some mornings.
For the next 30 minutes, he had us practice combinations on the bags in a way similar to that of a fitness boxing class I took last year.
From bouncing around on the sofa watching Ali and Leonard on the TV as a youngster with her father, to her mother taking her to an after-school boxing class as a 12-year-old; all Adams ever wanted to do was box.
There was an after-school boxing class on with some of the kids from school".
"After that my mum started doing aerobics and they had an after-school boxing class for the kids.
If you don't care for exercise for the sake of exercise or health, find an external motivation - for instance, take a local kickboxing or boxing class because you want to be able to defend yourself, or taking a yoga class because you want to make some new friends.
