It’s that time of year again. The darkest and shortest days of the year don’t just bring about cold weather; they can also bring about significant changes in your mood and how you feel.
Seasonal affective disorder (SAD) is a real thing that affects over 10 million Americans, with another 10-20 million said to struggle with mild symptoms.
If you live in a city with a true winter climate – like New York, Toronto, or London – you’re up to 10 times more likely to struggle with mild to moderate SAD. Also, adolescents and young adults are more likely to be affected.
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Vitamin D has been gaining significant momentum recently in the research for its ability to influence over 1,000 different genes in the body and subsequently some important performance parameters. Failing to get sufficient vitamin D regularly can negatively impact many endurance parameters, including maximal aerobic capacity (VO2 max), susceptibility to colds and flu, inflammation, recovery, and stress fractures.
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