Exercise too close to bedtime, and you may have trouble sleeping. Just make sure to exercise several hours before you hit the sack. "Exercising first thing in the morning can help wake up your body and regulate your circadian rhythm," Dr. Exercise can help combat winter fatigue, particularly if you take your workouts outside into the sunlight. Need to perk up before a presentation? Get some caffeine about an hour before it begins. Well-timed caffeine can help you feel more alert, awake and ready to take on the day. Open your blinds or curtains and get outdoors in the natural daylight as much and as early as possible. So exposing yourself to light as soon as you wake up in the morning helps motivate your internal clock. Light triggers your brain to stop producing the sleep hormone melatonin. Here are five energy-boosting solutions that can help put a spring in your step even during the darkest months. "It's important to understand that if we have a sleep loss because of anxiety that we're living through, that can produce more depression and mood disorders," Dr. Add physical distancing, post-holiday blues, and sleep disturbances to the mix, and it's no wonder exhaustion sets in. There's actually a psychological disorder called seasonal affective disorder (SAD) to describe the experience. Many people struggle with sadness, depression and anxiety during the winter. Concerned you may be deficient? Ask your doctor to test your levels. And because vitamin D is a hormone, it has a tremendous impact on mood, energy level and immune function. But getting those 10 minutes is harder in winter. With just 10 minutes of sun exposure, most people can produce enough vitamin D for the day. The end result: You feel tired more often. Unfortunately, reduced sun exposure can dramatically affect your circadian rhythm, causing your body to produce more melatonin (a.k.a., the sleep hormone). The days get shorter during the winter months, especially in northern states, Dr. Several physiological factors converge to make people feel more wiped out during the winter. So it makes sense that many of us want to hibernate through December, January and February. "We have less exposure to sunlight during the winter months, and that affects our internal clock," says Luisa Bazan, M.D., a sleep medicine specialist at Henry Ford Health. You may feel tired, groggy and sluggish all day long. With longer days, colder temperatures and little sun exposure, it's natural to crave more time in bed.
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