Yes, I think that it is better to exercise outdoors.

for the following reasons

most of all, i can get a fresh air and I can see a nice view

for example one  In my case, a year ago i joined the running clud 

and once a week i running with my club member  

ran with the club members once a week

And I could get can got a fresh air and see a nice view as I ran.

therefore i think it is better to exercise outdoors.

-> 주어진 시간에 맞게끔 질문에 대한 답변을 충분히 준비하셔야 할 것 같습니다. 수고하셨습니다.