Metabolic Costs of Daily Activities in Older Adults
- Conditions
- Functional Limitation
- Registration Number
- NCT02129855
- Lead Sponsor
- University of Florida
- Brief Summary
The work will evaluate the metabolic costs for daily activities across the lifespan and evaluate the influence of having functional impairments.
- Detailed Description
The work will evaluate the metabolic costs for daily activities across the lifespan and evaluate the influence of having functional impairments. The project will simultaneously conduct a cross-sectional and a case-control study. The primary aim will investigate cross-sectional association between older age and the energy expenditure of daily activities by recruiting approximately 25 adults in each of 7 age groups (20-30,30-40,40-50,50-60,60-70,70-80,80+) for a total of 180 individuals. A secondary aim will investigate the effect of functional impairments on the energy expenditure of daily activities by conducting a case-control study. An additional 25 older adults with functional impairment will be recruited in each age decade (60-70, 70-80, and 80+ years old) to accomplish this aim. Additional outcomes will evaluate rating of perceived exertion differences in daily activities. A tertiary aim will investigate using accelerometers to predict the metabolic costs of daily activities.
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 269
- Age 20+ years old
- Community dwelling adults without significant health issues
- Willingness to undergo all testing procedures
- Weight stable for at least three months
- Able to understand and speak English
- Failure to provide informed consent
- A 10% enrollment limit will be applied to avid exercisers in each age decade. Avid exercises will be defined as doing structured exercise 3 or more days per week (e.g. jogging, sports etc., walkers will be permitted in the study). Based on our experience, avid exercisers volunteer for this type of research at a high rate and thus the investigators will limit these individuals to prevent a biased comparison
- Use of walker (use of a cane is permitted)
- Lower extremity amputation
- Develops chest pain or severe shortness of breath during physical stress
- Post-stroke syndrome causing ambulatory deficits (other stroke survivors permitted)
- Pacemaker
- Needs assistance with basic activities of daily living: feeding, dressing, continence, bathing, toileting, and transferring from a bed to a chair or from a chair to walking
- Lives in a nursing home; persons living in assisted or independent housing are not excluded
- For adults over the age of 60: >2 errors on the Short, portable mental status questionnaire administered after written informed consent
- Excessive alcohol or substance abuse within six months or consumption of >14 alcohol drinks/week
- For women who are child-bearing age (up to 62 years of age): pregnant or breast-feeding
- Participation in a structured weight loss program or fad diet in the last month;
- Weight reduction surgery in the past year
- Known neuromuscular disorder (Rhabdomyolysis, Myasthenia Gravis, Ataxia, Apraxia, post-polio syndrome, mitochondrial myopathy, chronic fatigue syndrome etc.)
- Diagnosed neuropathy that causes pain
- Symptomatic peripheral arterial disease
- Unable to communicate because of severe hearing loss or speech disorder
- Severe visual impairment, which would preclude completion of the assessments
- Progressive, degenerative neurologic disease, e.g., Parkinson's Disease, Multiple Sclerosis, Amyotrophic lateral sclerosis
- Severe rheumatologic or orthopedic diseases, e.g., awaiting joint replacement, active inflammatory disease; self-reported severe osteoarthritis
- Terminal illness, as determined by the participant
- Severe pulmonary disease, requiring the use of supplemental oxygen or steroid therapy
- Severe cardiac disease, including New York Heart Association Class III or IV congestive heart failure, clinically significant aortic stenosis, recent history of cardiac arrest, use of a cardiac defibrillator, or uncontrolled angina
- Other significant comorbid disease discovered during medical screening, e.g. renal failure on hemodialysis, psychiatric disorder (e.g. bipolar, schizophrenia); chronic fatigue syndrome etc...
- Liver diseases: chronic hepatitis, an inflammatory disease, or cirrhosis
- Pregnancy. Participants within childbearing age will have a pregnancy test.
- Contraindications to graded exercise testing according to the American Thoracic Society:
- Acute myocardial infarction (<6 months since event)
- Unstable angina
- Uncontrolled arrhythmias causing symptoms or hemodynamic compromise
- Syncope
- Active endocarditis
- Acute myocarditis or pericarditis
- Symptomatic severe aortic stenosis
- Uncontrolled heart failure
- Acute pulmonary embolus or pulmonary infarction
- Thrombosis of lower extremity
- Suspected dissecting aneurysm
- Uncontrolled asthmas
- Pulmonary edema
- Room air desaturation at rest < 85%
- Respiratory failure
- Acute non cardiopulmonary disorder that may affect exercise performance
Study & Design
- Study Type
- OBSERVATIONAL
- Study Design
- Not specified
- Primary Outcome Measures
Name Time Method Relative metabolic cost to peak energy expenditure Participants will attend up to 4 visits within one month of enrollment to attain these data Relative metabolic cost is function of peak oxygen consumption
MET value Participants will attend up to 4 visits within one month of enrollment to attain these data MET value of physical activities defined as the oxygen uptake (VO2 = milliliter• min-1•kg-1) during a steady state rate expressed as a function 3.5 milliliter• min-1•kg-1.
Metabolic economy Participants will attend up to 4 visits within one month of enrollment to attain these data Metabolic economy is the energy expended for a given work rate.
Relative metabolic cost to resting energy expenditure Participants will attend up to 4 visits within one month of enrollment to attain these data Relative metabolic cost as a function of resting
- Secondary Outcome Measures
Name Time Method Rating of perceived exertion Participants will attend up to 4 visits within one month of enrollment to attain these data Ratings of perceived exertion will be collected during all activities. Investigators will use the Category Ratio scale-10 scale developed by Borg in 1982.
Trial Locations
- Locations (1)
UF Institute on Aging Clinical and Translational Research Building
🇺🇸Gainesville, Florida, United States