When you're down, it's better that you don't skip class. They say exercise is the best medicine. Nowadays, some form of movement is in just about every medical treatment protocol. I recently read a great article which supported this assertion that exercise is the best medicine.
In this article, the author cited an interesting experiment in which participants watched a sad movie clip and afterwards were split into groups who either jogged or stretched. After the activity, they were surveyed. The participants who jogged were more likely to have gotten over the sad film clip than those that just stretched.
What does that tell us? If we are feeling down or a bit under the weather, then we might want to come to class. Getting out coupled with the rigorousness of class can help us get out from under whatever is clouding our day. If one wanted to take it one step further, then maybe they can try starting the day out with morning class to see if it can set the tone for the day.
Either way, the best thing to do is to come to class. It can benefit you in more ways than you think.