Foods stay frozen longer if the freezer remains unopened, is full, is in a cool place and is well insulated. Usually food in a loaded freezer will stay frozen for two to four days, depending on its size. A half-filled freezer will keep food frozen only about 24 hours. Cover the freezer with blankets, keeping them away from the compressor, to help hold the cold.
Studies also found workers to be more fatigued. following a 12-hr shift when compared to an 8-hr shift. Night shifts can also be tiring. Mental and physical. effects of night work have been shown to affect a workerâs. concentration, alertness, motivation, and memory.
Not all shift workers suffer from sleep issues. But, approximately 10% of night and rotating shift workers are thought to have a sleep disorder known as shift work disorder. Between roughly 25-30% of shift workers experience symptoms of the disorder such as excessive sleepiness or insomnia.