I think it is better to exercise in a gym with equipment.

There are some reasons to support my opinion.

-> 좋습니다.

Most of all, I can learn exercise from an expert [또는 from experts]. It will be helpful for me.

-> It will be helpful 대신 ‘That way, I can work out efficiently’ 와 같은 표현도 쓸 수 있겠습니다.

Also, I can use the, various exercising equipment.

Let me tell you my story.

Two years ago, I got a went to exercise, in the gym.

At that time, I was, very helpful for me, [반복 피하기]because I can, I could learn...

I was able to effectively develop my muscles through working out with equipment.

I don’t think I would have gotten the same outcome if I had exercised outdoors.

Therefore, I think it is better to exercise in a gym with equipment.