Grammar fix
keep fit
stay healthy
to do regular exercise or physical activity so that your body stays healthy and strong.
collocationB1common
Hear it in context
Notice where the phrase sounds natural.
I go swimming twice a week to keep fit.
Personally, I think it's important to keep fit, so I try to walk or cycle instead of driving whenever possible.
Fix the pattern
One small grammar move makes it sound right.
Not: I do sport for keep fit.
Say: I do sport to keep fit.
Use 'to keep fit' (purpose), not 'for keep fit'.
Which sounds natural?
Tap the one a native speaker would say.
'Keep fit' is the compact, natural goal phrase; 'maintain my physical fitness' is gym-brochure formal.
Build natural chunks
Words that usually travel with it.
keep fit + means
- by running
- at the gym
- as you age
- and healthy