No, you do not print a resume double sided. A double-sided resume looks unprofessional and makes it difficult for hiring managers to look at all of your qualifications at once.
If you need a two page resume to show your qualifications, print out both pages and paperclip them together. Paperclipping your resume makes it easy for hiring managers to remove the clip and scan each page individually if they prefer.
However, in most cases your resume shouldn’t be more than one page long. Only if you have over 10 years of relevant experience and need extra space to communicate the depth of that experience should you have a 2+ page resume.