Extending the Fatigue Severity Scale to an obese population.

The Fatigue Severity Scale (FSS) is a self-report instrument used to assess levels of fatigue and its effect on daily functioning. The FSS was normed on individuals with multiple sclerosis and has been used in studies examining such factors as obstructive sleep apnea and aerobic exercise. Current research has extended it to obese subjects to assess their level of fatigue in conjunction with a 16-week obesity treatment program. Participants were 118 females with an average age of 45.24 (SD = 11.44). The results yield high pre- and post-test reliability for the FSS and weight loss.