I'm writing this diary after completing the aerobic exercise I mentioned yesterday.

The state of my mind right now can be summed up in one word: 'great'.

Despite feeling some discomfort in various parts of my body, it's a welcome feeling for me.

Both my brain and body feel in extremely good condition.

I can't help but wonder why I hadn't exercised for the past few days... I regret it!

I'm committed to continuing this exercise habit.

On another note, I purchased the English word book that I used in high school to improve my vocabulary skills in English.

However, there are few reviews of it in web search results.

I'm torn between two choices:

should I continue learning English words using the same familiar text, or opt for a highly rated text available on the internet?