Grammar fix

physical activity

exercise

any movement of your body that uses energy, like walking, playing sports, or doing exercise.

collocationB1common

Hear it in context

Notice where the phrase sounds natural.

Doctors recommend at least 30 minutes of physical activity each day to stay healthy.health
In my opinion, schools should encourage more physical activity because it helps students concentrate better in class.IELTS speaking

Pattern: physical activity (noun, uncountable or countable)

WrongI do many physical activities every day.

RightI get a lot of physical activity every day.

In this health sense 'physical activity' is uncountable; 'exercise' is more natural in speech.

Patternphysical activity (noun, uncountable or countable)

Choose the version that sounds natural in speech.

Stiff It is advisable to engage in regular bodily exertion.

Natural You should get some regular exercise.

'Bodily exertion' is clinical; in speech natives say 'exercise' / 'get active'.

Words that usually travel with it.

Unlike 'exercise', which usually means planned or structured movement, 'physical activity' is a broader term and includes all movement.