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The effects of a physical activity intervention on fatigue/alertness of female nurses working different shifts (morning, evening, night). The higher the number, the more alert the shift worker was. T - data for an exercise training intervention group. C - a control group which did not undertake the exercise intervention. * - P<0.05. ** - P<0.01. ⌐¬ - significant difference intervention and control groups in terms of mean pre-post changes. Harma et al. [89] Permission pending.
