Undeclared or Decided Major

I am applying to schools right now and have a question about majors. For my reach schools, would applying as undeclared have any advantage for me? Would it possibly help me get admitted? Or should I just decide a major, regardless of if it is impacted/popular or not? Thanks!

http://talk.qa.collegeconfidential.com/college-admissions/1947599-faq-does-intended-major-make-it-easier-or-more-difficult-to-get-into-a-college.html