Returning from a holiday or a more relaxed summer schedule does not only mean having more responsibilities again. It can also mean changing our sleep and wake times, daily activity levels and the way we organise our day. For some people, this transition may be accompanied by tiredness, sleepiness or difficulty concentrating during the first few days.

Fatigue, however, does not have a single explanation. Insufficient or irregular sleep, changes in daily routines and increased stress may all affect how we feel during the day. The picture is different when fatigue persists, is severe or comes with other symptoms, because other causes may then need to be considered.

What changes when our schedule changes?

The body follows biological rhythms that help regulate sleep and wakefulness. If we have been sleeping and waking later for several days and then suddenly return to an earlier schedule, the adjustment may not happen immediately.

Sleep regularity is considered an important part of healthy sleep. The CDC recommends keeping consistent sleep and wake times, including at weekends, while most adults need at least seven hours of sleep per night.

This does not mean that every episode of tiredness after a holiday indicates a sleep disorder. A temporary adjustment period may simply coincide with a changed schedule, particularly if total sleep time has also decreased.

The role of sleep in daytime fatigue

When sleep duration is reduced, alertness, concentration and everyday functioning can be affected. Persistent insufficient sleep has also been associated with adverse health outcomes, which is why adequate sleep duration and quality are important parts of a healthy routine.

Sleep timing also matters. A consensus statement developed by sleep experts, based on a systematic review of the literature, supports the importance of sleep regularity for health and performance.

How to make the transition easier

Returning to a routine does not require extreme changes. A few practical steps can help rebuild a more consistent daily pattern:

- Keep your wake-up time as consistent as possible.


- Allow enough time for sleep rather than relying on coffee or occasional long sleep-ins to compensate for tiredness.


- Reintroduce physical activity gradually if you have been less active.


- Keep meals and daily activities reasonably structured.


- Reduce activities that leave you highly alert or stimulated close to bedtime.

Physical activity does not necessarily mean formal exercise. Walking, active transport, household chores and other forms of movement all count. WHO recommends 150–300 minutes of moderate-intensity aerobic activity per week for adults, or an equivalent combination of moderate and vigorous activity, alongside muscle-strengthening activities on at least two days per week.

What about screens in the evening?

The relationship between screen use and sleep needs to be described carefully. Current evidence does not support a simple claim that blue light from screens disrupts sleep in every adult.

A recent National Sleep Foundation consensus statement found sufficient agreement about negative effects of general screen use and pre-sleep content among children and adolescents, but did not reach consensus for similar claims in adults or for the effect of screen light on adults.

In practical terms, it may therefore be more useful to reduce highly stimulating screen activity before bedtime and create a calm, consistent evening routine rather than presenting one specific intervention as a universal solution.

When should fatigue be assessed by a healthcare professional?

Temporary tiredness during a return to routine is not, by itself, a reason for concern. If fatigue persists or significantly affects everyday functioning, however, it should not automatically be attributed to the change in schedule.

Medical advice is particularly important when fatigue comes with persistent or concerning symptoms, significant daytime sleepiness or ongoing sleep problems. An assessment can help determine whether another underlying issue may be contributing.

Returning to a routine can make tiredness more noticeable, particularly when it involves changes in sleep timing, reduced sleep duration or increased daily stress. A gradual return to a consistent pattern of sleep, movement and daily activities may help. If fatigue persists or is accompanied by other symptoms, however, it should not simply be dismissed as part of getting back to normal.

Key sources

- CDC — About Sleep


- CDC — Sleep and Heart Health


- National Sleep Foundation — Sleep regularity consensus


- WHO — Physical activity guidelines


- National Sleep Foundation — Screen use and sleep consensus https://healthpont.com/why-do-we-feel-more-tired-when-we-return-to-our-routine/