2. Chronic Stress
We all know that ongoing stress isn’t healthy. However, chronic stress (the type that doesn’t let up) actually compromises your immune response, by lowering germ- and disease-fighting T cell levels. A famous 2004 meta-analysis from researchers at the University of Kentucky and the University of British Columbia, found that long-term stress (from a few months or years), virtually ravaged the immune system.
3. You Ignore Your Feelings
Do you tend to bottle up your emotions and bury them down, far down, instead of telling your spouse, your boss, or your friends how you really feel? You’re doing yourself a disservice, according to a University of California, Los Angeles, research team who found that letting it all out can actually be cathartic, and benefit your cardiovascular health and immune response (or white blood cell production). On the other hand, those who bottle emotions and opinions up, take up to 40-percent longer to recuperate from injuries and illnesses.
4. Social Hibernation
I can empathize with the feeling—after a long and stressful day at work you just want to forget all of your social engagements and bury your face in a book. However, a study from Carnegie Mellon University finds that those with fewer human connections are more likely to fall ill. The research revealed that social connection strengthen our immune system, by aiding recovering, and supporting emotional and physical well-being. While those who are prone to isolating themselves, suffer more physical and psychological health woes, and are less efficient overall at fighting off sickness.