Sleep and Exercise in Rheumatoid Arthritis

Sleep is an important aspect in maintaining the body's circadian rhythm. In general getting fewer than 5 hours sleep per day has been associated with cardiovascular problems, diabetes and obesity and can also be linked to depression and anxiety. Poor sleep is a common complaint among people with rheumatoid arthritis (RA) with disturbed sleep and fatigue known to affect up to 70% in this population. Poor sleep quality may contribute to the feelings of pain, fatigue and poor psychological well-being which in turn may further deteriorate functional ability and reduced activity.

It is known that exercise improves a person's psychological state which can also be an additional factor in improving or indeed disrupting quality of sleep. Exercise has been identified as an important part of the nonpharmacological management of poor sleep and in improving sleep quality however, people with RA were previously cautioned about undertaking exercise. Therefore, changes in sleep quality during exercise intervention should be evaluated so that society can understand more the potential for long-term changes in overall health status, in people who have RA. Indeed the intensity level of the activity in people with RA may be of additional importance.

Inclusion criteria

• Participants will be eligible to participate if they are aged 18-70; have a diagnosis of RA (defined by the American College of Rheumatology 1987 criteria); have poor sleep (Pittsburgh Sleep Quality Index global score >5); have a low disease score on 28 joints (DAS28) <3.2; Health Assessment Questionnaire result of <2.4 and are able to provided informed consent, understand and speak English. All the above will be determined should the person be interested in participating and before any fitness testing will be place.

Exclusion criteria

• Participants will be excluded from the study if they have severe physical disability (HAQ score > 2.5); are pregnant; participate in regular physical activity in their leisure time (self-reported aerobic exercise > 5 times per week); have cardiac symptoms corresponding to New York Heart Association (NYHA) functional classification > 2;