One of the least favorable aspects of winter is the shorter days. Less sunlight can contribute to a whole host of problems. For one thing, it can contribute to depression. Another side effect is feeling a level of tiredness not experienced during the warmer months when the days are longer and unfortunately the effects of this can filter into other areas of your life such as work performance. After all, it's hard to do your best when you're feeling lethargic.

Fortunately there are natural ways to combat exhaustion and help you perk up throughout your day - and hopefully prevent you from feeling like it's time to go to bed at 6:30 p.m.

Exercise
It probably sounds cliche and completely obvious, but physical activity can help you feel more alert. A study released earlier this year showed that sedentary people can increase their energy levels by 20 per cent and reduce fatigue by 65 per cent with consistent, low-intensity exercise.

Take a walk
Fresh air can act as an instant pick-me-up and have you feeling more alert than any cup of coffee will ever. Instead of staying at your desk or in the lunchroom for your entire break, take a few minutes to head outdoors. Alternatively, use your coffee break to spend a few minutes outside if lunchtime doesn't work for you.

Eat well
The tendency in winter is to head for the "comfort" foods, which are usually those high in carbohydrates and sugar. Unfortunately the resulting buzz doesn't last long and once you crash, you may feel even more tired than you did before. Instead focus on a healthy balance between lean protein, whole grains, high fiber and lots of fruits and vegetables. A bowl of cooked steel cut oats sweetened with a bit of honey and dried fruit will keep you going much longer than a glazed donut and multiple cups of coffee. Also make sure to have small mid-morning and mid-afternoon snacks to prevent low blood sugar levels which can leave you feeling low on energy.

Enjoy the day
If you stay holed up inside all day, you may be suffering from a lack of light exposure, which can lead to you feeling sluggish. And no that doesn't mean the bright fluorescent lights above your desk will do the trick, you actually need daylight to help combat that sleepy feeling. Run errands during daytime hours if possible or even go on a quick coffee run at about midday so you can enjoy some natural light.

» WebMD