I am a healthy 32-year old male, work out regularly in the gym, and run for about 40 min. to 1 hour once a week. Twice in the last few months I experienced fever few hours after running. It felt like a beginning of the flu (muscle aches, fever, lack of energy), but with no cough, sore throat, etc. Fever lasts for about a day, and I feel lack of energy for one more day, but after 48 hours from the start of this condition I feel absolutely healthy. Except for those 2 times, I never developed a sudden fever. Hydration should not be an issue.
So it might be a coincidence, but I'd like to know if there's possibility that there's a connection? What can it be?
Sometimes due to intense exercise like a 1hr cardio will get your body to secrete endogenous factors which cause fever like interleukin 1 a cytokine and also interleukin 6 and other pyrogens and prostaglandin E2.
With time and rest you would feel fine and for this the remedy is to acclimatize your body in a continuous way. You need to walk or do some amount of cardio in a more regular way than an intense workout once a week. Try doing some cardio on alternate days and one day intense in a week. Your body acclimatizes over a period of time and there is decrease of these endogenous pyrogens and factors and then you can continue this regime.
I am not taking into consideration any viral or external pathogens which cause fever taking your history into account and also taking into account that your thermometer is working fine. Consult a physician if your symptoms continue.
This site complies with the HONcode standard for trustworthy health information.
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. Med Help International, Inc. is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.