Exercise is essential for overall health — but as we age, our usual fitness routine might not be as effective. For people over 40, the body goes through hormonal and physical shifts that can impact ...

High-intensity interval training, or HIIT, is a great way to torch calories, boost your metabolism and get a great workout in a shorter amount of time. And if you're a fan of hopping on the treadmill ...

HIIT workouts cause a short-term spike in cortisol (a hormone that is part of the “fight or flight” response), which makes the body grow stronger. However, maintaining high levels of cortisol over the ...