What Is the Purpose of Sleep?
Sleep is essential for good health. In fact, we need sleep to survive — just like we need food and water. So, it’s no wonder we spend about one-third of our lives sleeping.
Many biological processes happen during sleep:
- The brain stores new information and gets rid of toxic waste.
- Nerve cells communicate and reorganize, which supports healthy brain function.
- The body repairs cells, restores energy, and releases molecules like hormones and proteins.
- These processes are critical for our overall health. Without them, our bodies can’t function correctly.
Let’s take a closer look at why we sleep, along with what happens if we don’t get enough.
Why do we sleep?
A lot is still unknown about the purpose of sleep. However, it’s widely accepted that there isn’t just one explanation for why we need to sleep. It’s likely necessary for many biological reasons.
To date, scientists have found that sleep helps the body in several ways. The most prominent theories and reasons are outlined below.
- Energy conservation
- Cellular restoration
- Brain function
- Emotional well-being
- Weight maintenance
- Proper insulin function
- Heart Health