Exercise Capacity and Daily Physical Activity in Obese Subjects With Treated Obstructive Sleep Apnea
Exercise Capacity and Daily Physical Activity in Obese Subjects With Treated Obstructive Sleep Apnea
Obesity is very common worldwide and breathing problems at night (obstructive sleep apnea,
 OSA) are common in obesity. Despite the best treatment, obesity and OSA are linked to early
 death from heart problems. They are also associated with lower levels of physical activity.
 Exercise strategies for weight loss, increasing physical activity and improving fitness are
 needed for obesity. In Obese individuals with OSA

 1. The investigators will compare corridor walking tests compared to laboratory exercise
 tests. The null hypothesis is that the peak oxygen uptake achieved and the
 cardiopulmonary response during both the six-minute walk test and Incremental Shuttle
 Walk Test would not be different from that observed during an Incremental Treadmill
 Test.

 2. The investigators will investigate whether cycling or walking uses more calories for the
 same intensity. We hypothesise that cycling (weight supported) will be endured for long.

 3. The investigators will compare commonly used exercise tests with levels of daily
 physical activity.

 The information from these three projects will help us set up the optimal exercise program
 for obese individuals.
Inclusion Criteria:

 -  Obstructive Sleep Apnea

 -  Obesity BMI>30

 -  Controlled on Continuous Positive Airway Pressure for three months

 Exclusion Criteria:

 -  cardiac co-morbidity e.g ischaemic heart disease, chronic heart failure, valvular
 heart disease

 -  pulmonary co-morbidity

 -  neurological condition limiting the ability to perform walking or cycling

 -  orthopaedic condition limiting the ability to perform walking or cycling