It is good to read articles in JAMA as it will keep you updated,however as a premed student, there are lots of priorities you need to keep on top. Many JAMA archived articles can be accessed online plus the internet has variety of articles that will sure keep you abreast. You can spare some time browsing in the internet and if you really want to invest on something that would help you improve medical knowledge, I would rather suggest subscribing MD CONSULT where you will gain an access to various medical textbooks, journals,clinics, images, researches,news and many more. But being a freshman premed student, it seems to be too advance to read on most of them for now. You rather concentrate on giving time of learning extensively the basics such as Anatomy and Physiology,Advanced Biology, Microbiology, Biophysics, Pharmacology and Toxicology, All the Chemistries including Biochemistry and many other related sciences.