Recently I attended an info session at UPenn, and afterwards, I asked the admissions officer what happens if someone who does a lot of extracurriculars that he/she likes to do, but these extracurriculars are overrepresented in the applicant pool. Though I spared the officer the details, I was referring to medical-related extracurriculars–I have a lot of experiences in the medical field, and it’s what I find interesting, but I’m an Asian male, which may put me at a disadvantage. In response, the officer told me to not worry about overrepresentation, but I still can’t shake the fact that something will work against me, based on the fact that I fit a certain stereotype. Any advice?
With more applicants doing the same EC, the achievement level overall is likely to be higher, so your achievement level in that EC needs to be higher to stand out enough to catch the attention of an admission reader.
Okay thanks!
You can worry or be concerned about a lot of things - but this isn’t one of them. If UPenn doesn’t want you for who you are - then you will go to a school that does appreciate you. Relax and enjoy the trip! 
Agree. The best course of action is to pursue ECs that interest you because that will shine through.
Totally agree. If Penn rejects you, I can almost guarantee you that it will not be because of which EC’s you pursued.
If you are sure UPenn is your first choice, definitely consider applying ED. That way you at least aren’t competing directly against all the applicants with a similar profile in the RD pool. That was the thinking we used when D applied ED to her LAC, where there are significantly more female applicants than male. She was an unhooked high stats white girl with debate EC’s. We figured there would be a lot with a similar profile in the RD pool for this LAC, and ED would increase her chances of standing out. Also, UPenn filled 54.6% of its class through ED this year. http://www.thedp.com/article/2015/12/early-decision-acceptance-rate