It is not recommended to work out when you have a cold, because most people with colds have fatigue and tiredness, and those with fever will have muscle aches and pains, and people with colds who do not rest well may have dizziness and nausea. Fitness is generally a large amount of exercise, will cause the whole body sweating, which may aggravate the symptoms of the cold, and fitness after sweating too much is also easy to lead to dehydration, electrolyte disorders, for the recovery of the cold is not favorable. Cold patients can walk exercise appropriate sweat, drink more warm water or salt water to replenish the lost water.