Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Dr. JeFreda R. Brown is a financial ...

Psychology Today's online self-tests are intended for informational purposes only and are not diagnostic tools. Psychology Today does not capture or store personally identifiable information, and your ...

The Marine Corps' combat fitness test (CFT), taken every six months, is intended to keep Marines ready for the physical rigors of contemporary combat operations. Individual readiness will be measured ...

Don’t worry, it’s not just you. Everyone dropped their first, or likely fortieth, F-bomb when their dad had them hold the spark plug while he hit the kickstarter on their dirt bike. While it might ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Eric's career includes extensive work in both public and corporate accounting with ...

Mark Gurarie is a writer covering health topics, technology, music, books, and culture. He also teaches health science and research writing at George Washington University's School of Medical and ...

Lindsay Curtis is a health & medical writer in South Florida. She worked as a communications professional for health nonprofits and the University of Toronto’s Faculty of Medicine and Faculty of ...

If you have trouble breathing, your doctor may recommend a few tests to figure out what’s causing it. Some measure how much air you breathe in or out or how much oxygen is going from your lungs to the ...