The answer:
All of the above
Decomposition is the suffix
After a workout, your body needs time to rest and repair itself from the previous workout. According to the Mayo Clinic, running too far too often, lifting too much weight or simply pushing yourself too far can lead to muscle strains and sprains, shin splints, and stress fractures.
A harmful side effect would be breaking out in hives. Yes, having chills is detrimental to your sleep, but not dangerous. Hives are a sign of anaphylactic shock, something that can kill. If you break out in hives from a medication, you should call an Urgent Care. If you get hives and labored breathing you should call an emergency room.