Fig. 1.

A hypothesized temporal process is that (1) the effort from work demands together with (1) effort from work-demand compensating strategies is potentially balanced together with (1) resources that are either or both effort-moderating and (1) effort-reversing in the work place. The result from effort and effort moderation and reversal at work is accompanied by (2) short-term load reactions in terms of need for recovery NFR. (3) Fatigue that is not reversed between the work shifts means effort from residual fatigue, which adds to the weight of effort from work and from work-demand compensating strategies to NFR. NFR is in turn accompanied by (4) risk for health effects