What's the difference between fitness and keeping healthy?

Keep fit and stay healthy? The differences are: different parts of speech, different emphasis and different usage.

First, the parts of speech are different.

1, keep healthy: verb phrase: keep healthy.

2. Keep fit? Noun phrase: fitness.

Second, the emphasis is different.

1, keepfit: Keepfit focuses on staying healthy.

2. Keep fit? : keep fit? Pay attention to keeping healthy through fitness methods.

Third, the usage is different.

1, keep fit: as a verb phrase without an object: We? Is it okay? Keep? Is it suitable? By who? Where are you going? Exercise. We can keep healthy by taking part in physical exercise.

2. Keep fit? As an object: yoga? Is it? Answer? Very? Okay？ Way? Where to? Keep? Fitness. Yoga is a good way to keep healthy.