"do physical exercise" is a correct and usable phrase in written English.
You can use it any time you want to tell someone to engage in physical activity. For example, "I want to stay healthy, so I make sure to do physical exercise every day."
Just as we need to do physical exercise to maintain the health of bodies that evolved for a physically active hunter-gatherer lifestyle, perhaps we ought to start doing more cognitive exercises to maintain our mental health, especially if we only speak one language.
Fitness coach Roberto Bassagaisteguy told local media in June: "As a rule he does not do physical exercise.
"I was very young, and some of them said to me, 'Can you compete?' They touched my legs and said: 'You need to do physical exercise.
In January fitness coach Roberto Bassagaisteguy told local media Ronaldinho had a tailored regime because "as a rule he does not do physical exercise - I cannot make him run because he doesn't like it.
(Jan 2015: Mexican club Querétaro's fitness coach reveals he gave Ronaldinho a tailored regime because "as a rule he does not do physical exercise - I cannot make him run because he doesn't like it. There are many things he doesn't like").
I felt like I would never find any relief, and worried that the TBI would leave me permanently impaired and unable to ever do physical exercise again.
They'll ask the question: Why do physical exercises when dancing have equal or greater benefits and be fun at the same time?
Do physical exercises that stimulate your body.
She does physical exercise almost every day – including, pleasingly, tap-dancing classes – and has the easy grace of someone who can touch her toes without much trouble.
