You do not need to keep your CV to one page. They are not meant to be one page unless you have a pathetic number of achievements. This is a resume rumor that people use in other professions for entry level jobs. Not in medicine!
You ought to have sections for academic experience, awards and achievements, extracurricular activities including leadership positions and community service activities, publications/presentations/conferences, any other qualifications, and personal data (languages, hobbies, etc.) If you can fit all that into one page, you haven't done much.