I have about 40 hours shadowing right now, I'm hoping to add maybe 30 hours more shadowing a physician in China during my study abroad this summer. Is 70ish hours enough? Additionally, I don't have other clinical experience, mostly because I spent all my extra time playing/training for Ultimate frisbee (I calculated about 2700 hours over last 3 years). My ECs are solid b/c of Ultimate, research, and volunteering 1000ish hours at a camp for physically and mentally deficient kids. My grades (3.93, w/ science 3.95) and MCAT (42) are excellent. Am I competitive for top 20 med schools with my lack of clinical experience?