The first one is fitness, which will not help you. After all, no matter how others help you, your body is your own, and it will only be effective if you are willing to move. On the contrary, if there are too many people, he won't go today, and no one will want to go tomorrow. Over time, it will affect his fitness, and he will also be influenced by their lazy habits. So fitness may start with many people, and then only a few people. This road itself is painful and lonely, so it is better to experience and grow alone.
There is another person who travels alone. Although it may seem a little lonely, when that loneliness is over, the rest are happy. If two people travel together, it is easy to agree, but a group of people will be confused when traveling. If you want to go there, he will delay the time. If he is alone, he can go wherever he wants. I can stay at any scenic spot I like for a while, but I don't like to leave right away, so this is a solo trip.
Then there is reading, because reading is the same as fitness, one is the mind and the other is the body. These two things are of little help to you, and you need to face them yourself. In fact, reading alone seems lonely. In fact, you are communicating with the author about him and his thoughts. Especially when you are at the bottom of your life, reading alone to improve yourself and make yourself better is a good way to get rid of the bottom.