When daylight saving time kicks in people gain an hour of daylight but also lose an hour of sleep, and a Mayo Clinic sleep neurologist said that seemingly small change can significantly affect the body.

“”We have more difficulty springing forward than we do falling back,” said Dr. Brynn Dredla

She explained that it’s a similar effect on the body as jet lag — when someone flies to Europe, for example, and are suddenly hours ahead of the time their body thinks it is.

“If someone sleeps from 10 p.m. to 6 a.m. and then we spring forward, on Monday morning we’re asked to now be driving when we should normally be sleeping,” she said. “So that can be a big impact because our body is under the impression it should be asleep when we’re asking it to perform a pretty complex task.”

The body’s internal clock, or circadian rhythm, no longer matches the external clock, which Dredla said causes us to feel sluggish and foggy-headed, “And it usually takes two days before we’re able to get back into our normal routine.”

She suggested preparing for the change starting about two or three days before daylight saving time by going to bed 15 minutes earlier and waking up 15 minutes earlier. That way, your body has a slower, more gradual adjustment to waking up early.