Association between cognitive performance, physical fitness, and physical activity level in women with chronic fatigue syndrome.

Limited scientific evidence suggests that physical activity is directly related to cognitive performance in patients with chronic fatigue syndrome (CFS). To date, no other study has examined the direct relationship between cognitive performance and physical fitness in these patients. This study examined whether cognitive performance and physical fitness are associated in female patients with CFS and investigated the association between cognitive performance and physical activity level (PAL) in the same study sample.

Tired of being inactive: a systematic literature review of physical activity, physiological exercise capacity and muscle strength in patients with chronic fatigue syndrome.

A systematic review was undertaken to examine whether patients with chronic fatigue syndrome (CFS) differ from healthy sedentary controls in physiological exercise capacity, physical activity level and muscle strength. From the available literature, it can be concluded that patients with CFS perform less physical activity during daily life, and have less peak isometric muscle strength compared to healthy sedentary control subjects. Conflicting data in relation to physiological exercise capacity of patients with CFS have been reported, but the weighted available evidence points towards a reduced physiological exercise capacity in CFS.