The Mayo Clinic says those are common reactions to the changing seasons, but it could be something more serious than cabin fever.

Heidi Griffith is feeling the effects of these long winter days.

"I get kind of sad when it gets dark very early," said Griffith. "It just feels like I go to work in the dark and go home in the dark, so you get kind of bluesy."

Her cure for those winter blues?

"Definitely coming here and exercising is wonderful, if you can get on the treadmills or the elliptical, do a little weight workout, it's really nice," said Griffith, who works out regularly at the Clarksburg YMCA.

YMCA trainers say that endorphins are the easiest way to combat that cold weather depression, more commonly known as seasonal affective disorder.

"As you exercise, your endorphins are increased," said trainer Michael Menendez. "As your endorphins are released, you feel better, it makes you feel better, it makes you want to come back and work out regularly."

Psychology experts agree.

"It's true that exercise is as effective as antidepressants in helping combat depression," said Dr. Paula Bickham, a licensed psychologist at the United Summit Center in Clarksburg.

She also says that light is a factor.

"The season has to do with it because we know there's some changes in melatonin with the change in light outside," said Bickham. "There's some information that even taking a walk 30 minutes, 45 minutes, an hour a day being outside is enough light to counteract seasonal affective disorder."

Griffith says the best thing to do is to stay positive.

"Just trying to keep a positive attitude and remember that the sun will eventually come back," she said.

Doctor Bickham also says it's better to catch a shift in your mood early than late, so you can be more proactive about any kind of depression.