Q. What is the recommended way to spend time during implementation?

A. The fasting period might feel long.

Since meal times are omitted, you'll have more time than usual.
To make productive use of this time, why not try decluttering, cleaning, or organizing your belongings – tasks you usually put off?

Light daily exercise is also recommended for refreshment. Consult your body and incorporate exercise within a comfortable range.
Excessive exercise can conversely put too much strain on your body, so please avoid it.

You might feel fatigue or drowsiness due to lack of energy.
There's also a possibility of collapsing from anemia or low blood sugar when out, so it's recommended to spend time in an environment where you can rest at any time, ideally at home.