As we sleep, our brain moves through four stages and two phases: non-rapid eye movement (NREM) and rapid eye movement (REM). The brain has four stages within the NREM phase. Each stage and phase of ...

Common symptoms of knee arthritis include joint pain, reduced movement, and difficulty walking. Find out how you can ...

In a new study, participants who did 10 reps of these four exercises every day saw physical and mental improvements after a ...

Deep sleep is the restorative stage of sleep. During this stage the body undergoes tissue repair, the immune system is strengthening, and human growth hormone is released. “For kids, this stage of ...

The five phases of mitosis and cell division tightly coordinate the movements of hundreds of proteins. How did early biologists unravel this complex dance of chromosomes? The most obvious ...

I talked to two ob-gyns and two mental health experts to find out what happens to menstruating people’s bodies and minds during each of the menstrual cycle phases. Here, I’ve broken down everything ...

Imagine waking up thirsty at night and having to reach for a glass of water in the dark. Without a clear view, your brain has ...

The menstrual cycle has four phases: menstrual, follicular, ovulation, and luteal. The main purpose of the menstrual cycle is to produce an egg for potential fertilization by sperm. Stress ...