VOA慢速英语:你生病时应该锻炼吗？

mild – adj. not extreme or severe

rule of thumb – idiom a broadly accurate guide or principle, based on experience or practice rather than theory

symptom – n. a change in the body or mind which indicates that a disease is present

nasal congestion – n. Nasal congestion is the blockage of the nasal passages usually due to membranes lining the nose becoming swollen from inflamed blood vessels.

fitness trainer – n. a person who works with a client to plan a course of exercise

sniffle – v. to repeatedly take air into your nose in short breaths that are loud enough to be heard because you are sick or have been crying

tightness – adj. difficult breathing