I think liquids are more important when you're sick honestly, though if you're sick you need some sort of energy/calories in order to recover. I did some research on this and found advice from a sickness expert:
Quote:
Dr. Jon S. Abramson, a pediatric infectious disease expert at Wake Forest Medical School, has found no medical evidence to support feeding a cold and starving a fever. He is particularly offended by the latter part of the phrase.
As Abramson explained, when we are sick, whether we have a fever or not, our metabolic rates skyrocket, and our bodies need more calories to support that high metabolic rate. The hotter a fever becomes, the more energy the body uses, and not replenishing this energy with sugar and electrolytes is extremely dangerous, especially for children, who have less reserved energy than adults.
"Always feed both colds and fevers," Abramson said. "Patients should eat chicken soup, juice, anything with calories. Most importantly, I want my patients to drink lots of liquids. Dehydration is our key concern when dealing with sicknesses, especially in children, and especially with fevers."