COPD Clinical Trial
Official title:
Sedentary Behaviour, Physical Activity and Cardiometabolic Risk in Chronic Obstructive Pulmonary Disease
Investigation into the associations between sedentary behaviour, physical activity, body composition and cardiometabolic risk in COPD. A single assessment visit with fasting blood tests, body composition and strength measures followed by a week of activity monitor wear to record sitting time and physical activity. Cardiometabolic risk markers include fasting glucose, HBA1c, HOMA and lipids and blood pressure.
Chronic Obstructive Pulmonary Disease (COPD) is a condition associated with low levels of
physical activity and sedentary behaviour (i.e. too much sitting). In addition there is a
higher level of heart disease and diabetes in those with COPD. This adds to the burden of the
disease. This study will be measuring sitting time using a specific waist-worn monitoring
device. The amount of sitting time will then be compared with cardiovascular (heart disease)
risk markers, diabetes risk markers and body composition (i.e. fat and muscle mass).
The measurement of cardiovascular and diabetes risk markers will include blood tests to look
at blood sugar levels, lipids, cholesterol and insulin resistance as well as blood pressure
and heart rate measurement. Body composition measurements will include height, weight, waist
circumference, hip circumference as well as scales that will measure body fat and muscle mass
and a scan called a dual energy x-ray absorptiometer (DEXA) which uses a type of x-ray to
measure body tissues. This involves a very low dose of radiation, much smaller than a normal
x-ray.
Quadriceps strength will be measured to provide information on the strength of the muscles.
The sitting device will be worn for 1 week and at the end of this week it will be delivered
or sent back by the participant together with a questionnaire about how acceptable the device
is to wear.
Additional measures will be included in the assessment in order to examine the results
appropriately and reduce bias. These measurements include lung function (breathing) tests,
fitness tests (4 metre gait speed and incremental shuttle walk test) and questionnaires about
age, gender, ethnicity, medical diagnoses, medications (with detail about oral steroid use),
smoking (including pack yrs), exacerbation history, breathlessness, anxiety, depression and
motivation, frailty, Physical Activity and Sedentary Behaviour Questionnaire, Employment and
Occupational status and history, device Acceptability questionnaire.
Participants will attend an assessment visit. As some of the blood tests need to be done
under fasting conditions, i.e. without consuming food or liquids other than water for 8
hours, this will normally take place in the morning. Following the blood tests they will be
offered a drink and snack before undertaking any physical measures.
Healthy volunteers of a similar age will also be recruited and attend the same assessment
visit to allow comparison between groups to be made.
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