National competitor in Karate any good for Harvard?

None of us is a Harvard admissions officer, so nobody here knows the rubric for 2-6 . We know that 1 is a recruited athlete. My guess is medaling in a national competition would be a 2 and participating, but not medaling, would be a 3.

From another of your threads: “GPA:- Unweighted: 3.8”
http://talk.collegeconfidential.com/what-my-chances/2090165-hsm-penn-duke.html#latest
So, I would make no such assumption.