A gerund or a gerund phrase can be the subject of a sentence.
swimming uses more muscles of the body than almost any other form of exercise.
Watching sports isn't nearly as fun as playing them.
Make a gerund or gerund phrase negative by putting not before it.
Not exercising is a sure way to gain weight. Not warming up before you exercise can lead to injuries.
Note that a gerund subject takes a singular verb.
Getting in shape takes time and effort.
Superlative + Present Perfect
The present perfect can be used after a superlative.
This is the most exciting sporting event l've been to in a long time.
Who is the best soccer player you've ever seen?