When you exercise, the cells in your brain (and the rest of your body) start firing, becoming more energized. You also produce more serotonin and dopamineâboth crucial in mood elevation. Some credit these chemicals with whatâs known as the ârunnerâs highâ, common in endurance athletes. But we do know they make you feel good, and a sense of wellbeing and happiness can increase your physical health in turn.
You're most likely to get mononucleosis with all the signs and symptoms if you're an adolescent or young adult. Young children usually have few symptoms, and the infection often goes unrecognized. If you have mononucleosis, it's important to be careful of certain complications such as an enlarged spleen.
The most common symptoms of mono are: 1  Fever, which may range from 101Â°F (38.3Â°C) to 104Â°F (40Â°C) , and chills. 2  Sore throat, often with white patches on the tonsils (which may look like strep throat). 3  Swollen lymph nodes all over the body, especially the lymph nodes in the neck.4  Swollen tonsils.5  Headache or body aches.ot everyone infected with the virus that causes mono (Epstein-Barr virus, or EBV) has symptoms. This is especially true for young children, who may have a fever but no other symptoms. People ages 15 to 24 are most likely to have obvious symptoms.