Day Ultimate HIIT Challenge will boost your metabolism and build strength. Access the full program schedule and workout ...

Follow along with trainers Jacqueline Kasen and Gerren Liles in the workout video above, or if you're ready to HIIT it solo, read the instructions below for a self-guided workout.

But to get the benefits of HIIT, you need to be ready to work hard. A true HIIT session involves short bursts of intense ...

Fitness expert Malia Frey shows us that there are plenty of simple ways to move more throughout your day, even ...

Rain fell on the first day of spring March 19. A kindergarten boy, a week removed from never wanting to go back to school, looked out the window. He’d do anything to see his school bus. To ...

The workout is broken down into eight rounds with 30-second work intervals for each exercise (two minutes in total) and a ...

While you are trying to keep up with your health, here are some of the indoor exercises you can consider to strengthen your ...

Experts explain the best ways to measure your cardio fitness, plus the most important strategies for improvement.

How old are you really? New epigenetic tests from TruDiagnostic, Tally Health, and Inside Tracker will determine your biological—rather than chronological—age.

Sprint workouts torch belly fat, boost metabolism, and improve insulin sensitivity for faster results. Learn how to do them for maximum fat burn.

Determined to find something challenging but manageable, I found personal trainer Sydney Cummings Houdyshell’s recent ...