To make sure you're "in the zone," Zone 2 cardio participants aim to "keep their heart rate at 60% to 70% of their maximum heart rate," says Dr. Michael Fredericson, director of the physical ...

In TODAY.com's Expert Tip of the Day, a therapist reveals how to tell if you're in a "functional freeze" and why it's important to address it sooner rather than later.

No. 1 Sign of Being Raised by a Narcissist Growing up with a narcissistic parent or caregiver can significantly affect a person's development, mental health and behavior in childhood and adulthood.

These tend to be pretty hard workouts, but they’re usually not too intense. Power zone max (PZM): These rides will take you into the higher zones (6 and 7) with easy recoveries, usually in zone 1.