Can One Gain Control Over Their Diet While Working in a Three-Shift Pattern?

Individuals working in a shift system lose significant amounts of energy and often have difficulties with regular eating, which can have negative health consequences. The condition and health of shift workers are severely threatened, particularly those working night shifts. Glucose tolerance and insulin sensitivity are significantly higher during the day than at night, causing shift workers to often consume meals during times of increased insulin resistance. Additionally, an irregular work schedule can be a stressor for the body, leading to problems such as fatigue, insomnia, reduced performance, loss of appetite, gastrointestinal disorders, or cardiovascular diseases. Human body functions are subject to specific day and night rhythms, which are regulated by the so-called biological rhythm, which reacts to light and controls the biorhythm. Shift work disrupts this rhythm, requiring high endurance both during the day and at night. However, food intake has little impact on the biological rhythm, and shift workers must pay attention to the regularity of their meals and consume them at appropriate times to support the body in providing energy necessary for the transition between day and night rhythm.

It is important to highlight that regardless of whether a person is working shift or not, general nutritional guidelines must be adhered to: – a well-rounded meal must be consumed prior to commencing work; – meal breaks should not exceed more than 4–5 hours; – meals should be evenly distributed throughout the day, in accordance with a suitable calorie plan; – approximately 2.5 liters of water should be consumed during the day; – excessive amounts of caffeine should be avoided; – the last meal should be taken approximately 2–3 hours before bedtime.

During the first and second shifts, maintaining a consistent rhythm is key. Similar rules apply as for individuals working from 8 am to 4 pm. The most important thing is to consume the first meal within an hour of waking up, even if one does not feel hungry after getting out of bed. The timing of each subsequent meal depends on their number. If someone eats four times a day, the break between meals should be around 4-5 hours, at five meals, 3-4 hours, and at six meals 2.5 hours. It is important to consume the last meal approximately 2-3 hours before going to bed, to avoid unnecessary strain on the stomach and problems with falling asleep. If someone works physically, the meals during working hours should be more substantial. Depending on the shift that happens, meals are swapped. If someone works on the first shift, they should consume a generous breakfast, the remaining meals consumed during work will stand out with higher caloric content than the meals that will be eaten after returning home. In the case of the second shift, the situation is reversed. In the morning, one should eat something light, and before work, a hearty meal.

Working during the third shift, which is the night shift, creates more difficulties in dieting. Note that the energy needs of people who work at night are as high as those who work in the morning, only the distribution of meals looks different. One should not stop eating at night as it should be as nutritious as during the day and supplement energy loss. In this way, you normalize your appetite and prevent digestive problems. Never forget to keep proper breaks between meals at home, which should not differ from those during the first and second shift. Before starting work, you should eat a rich meal. During the night, be careful not to consume too much fat and animal protein, as the body requires more energy for their digestion and absorption, and unfortunately, the digestive system works in night mode, which means reduced functions. For this reason, protein shakes are perfect at this time, as they are quickly absorbed and do not overload the stomach. After returning home, you should eat a light meal, as soon it will be time to prepare for sleep. Sleep is extremely important. Even despite irregular work hours, you should take care of sleep hygiene. Note that lack of sleep is linked to obesity. Therefore, preventing obesity is not only about physical activity, but also about rest.