There's no shortage of apps and technology that claim to shift the brain into a "theta" state—said to help with relaxation, inward focus and sleep. But what exactly does it mean to change one's ...

Can’t sleep? Between screen time and the demands of daily life, your brain doesn’t just shut off when you hit the pillow. Sleep experts say your brain waves control how well you sleep. Think of your ...

If you can’t fall asleep at night you might resort to desperate measures, like eating melatonin gummies, blasting your rain sound machine, or dousing yourself in lavender spray. Sometimes, though, ...