Mark A · evenings
What an evening can take in
Weeknight evenings are the most common place people try to fit side work. On paper they look generous: a working day ends around six, sleep starts around eleven, and the gap between is roughly five hours, five nights a week. Subtract dinner and a few chores and it still appears that two or three evenings could hold a small project without anyone noticing.
The research on what evenings already do suggests a more careful reading. Those hours are not idle. For many workers they carry out a job of their own, and that job has a name in the literature: recovery.
The recovery research
The best-known framework comes from the work psychologists Sabine Sonnentag and Charlotte Fritz. In a 2007 paper in the Journal of Occupational Health Psychology they described four "recovery experiences" that people report during time off: psychological detachment from work, relaxation, mastery (learning or doing something challenging outside of work) and control over how the time is spent. They developed a questionnaire to measure them, and it has since been used in a large number of studies.
Of the four, detachment, meaning not thinking about work at all, has drawn the most attention. Sonnentag and colleagues have repeatedly found that people who report more detachment in the evening also report less fatigue and better mood the next day. A 2010 study by Sonnentag, Binnewies and Mojza linked low detachment over time with more emotional exhaustion.
The relevance for side work is direct. An evening spent on another job, even a pleasant one, is an evening that may involve less detachment, less relaxation and less control. It can, however, involve mastery. A side project that feels like a craft rather than a chore may count as a recovery experience in that framework, which is one reason the same two hours can feel restorative for one person and draining for another.
The framework describes associations at the level of groups. It does not predict how any individual evening will go, and it says nothing about earnings.
Where the evidence is weaker
Much of this research relies on self-report. People rate their own detachment and their own fatigue, which makes it hard to separate the two: someone already tired may both detach less and feel worse the next morning. Many studies are short diary studies lasting one or two working weeks, and samples have leaned toward office and service workers in Europe. Longer studies with objective measures, such as sleep tracking, exist but are fewer.
The research also mostly concerns people whose evenings are free of paid work. Studies looking specifically at evening side work, as opposed to overtime from the main job, are rarer. Applying the findings to side work is a reasonable inference, not a tested one.
Reading an evening honestly
What the literature does support is a simple point of method. An evening should be counted as an hour of something, not an hour of nothing. When side work is planned into weeknights, the useful question is which part of the evening it replaces. Replacing passive screen time is a different trade from replacing sleep, exercise or time with other people, and the recovery research suggests those trades show up later in the week.
It also suggests the type of work matters. Tasks that resemble the main job, at the same desk, on the same screen, are the ones least likely to offer any detachment. Tasks that differ in kind, made with the hands, done outdoors or with other people, at least leave room for mastery.
None of this says whether side work in the evening is a good idea. That depends on circumstances that no general article can see. It only says that the evening was already doing something, and that it is worth writing that down before sewing anything into it.
- Sonnentag, S., & Fritz, C. (2007). The Recovery Experience Questionnaire: Development and validation of a measure for assessing recuperation and unwinding from work. Journal of Occupational Health Psychology, 12(3), 204–221.
- Sonnentag, S., Binnewies, C., & Mojza, E. J. (2010). Staying well and engaged when demands are high: The role of psychological detachment. Journal of Applied Psychology, 95(5), 965–976.
- Sonnentag, S., & Fritz, C. (2015). Recovery from job stress: The stressor-detachment model as an integrative framework. Journal of Organizational Behavior, 36(S1), S72–S103.