MedlinePlus provides links to authoritative information for the general public on many health issues. You can find summary information, news articles, health check tools, statistics, and a link to selected journal articles. Here are some links to MedlinePlus. Use the search box if you do not find what you are looking for.
PubMed is a very large database with records for millions of articles. It's easy to get overwhelmed! A great way to start your research is to take advantage of PubMed's Medical Subject Headings (MeSH). Try using the MeSH terms for Exercise or Physical Fitness, along with other relevant MeSH terms or keywords for your research topic. You can browse for MeSH terms in the MeSH database. When you find one that you want to use, click the button on the right that says "Add to search builder." When you're finished adding MeSH terms to your search, you can search PubMed using the "Search PubMed" button. Getting too many results? Try going back to MeSH and checking the box that says "Restrict to MeSH Major Topic." This will limit your search results to only the most relevant articles. Remember you can also use the filters on the left side of the PubMed results screen! Using the Article Type - Review filter is particularly helpful when you're starting your research.