but daylight savings time may have an impact

on your body.

(clock smashing)

The time shift interferes with

(sheep baaing) circadian rhythm

and therefore can affect your sleep

(sheep baaing) for up to a few days.

What is circadian rhythm?

There is a rhythm to almost all bodily functions

from hormonal secretions to feeling energized

or sleepy at different times of day or night.

That cycle, or rhythm, is called circadian rhythm

which is set by our internal clock in the brain

and is in fact about 20 minutes longer than 24 hours.

There are also two other factors at work

along with circadian rhythm to regulate our sleep.

One is the natural build up of a chemical in the brain

called adenosine which will make us sleepy

(sheep baaing) as the day goes on.

The third factor is any excitement,

such as good news or bad news.

So what happens during spring daytime savings is

that we pull the clock forward.

It's like having stayed up an hour longer the night before.

So we would feel a little sleepy.

So what you should do to avoid any harm in the spring.

Go to bed an hour earlier the night before if you can.

Lighten up your schedule that night

and cut back on caffeine that day.

The next day you should be able to fall asleep

by the new time.

(upbeat music)