Archived material from the LABS study participant website (via web.archive.org, snapshot of 2012-08-25). Historical document — links and contacts may be outdated.
LABS Terms
LABS Study terms
Ancillary Studies: These are not part of the main LABS study but still use LABS participants. These studies will help to supplement the data, research and findings of the LABS study. They vary from investigations of behavior, sexual function and genetics.
LABS-1: LABS -1 enrolled all patients (4776) at the participating sites to collect pre-surgical information including medical history, information on the type of bariatric surgery, and status of all participants 30 days after surgery.
LABS-2: LABS-2 enrolled 2458 patients to collect detailed information before and yearly after surgery about weight, medical status, behavior, quality of life, physical activity, and health care needs to assess the longer term effects of bariatric surgery.
Substudies (only LABS participants at certain sites were approached for these studies):
LABS-3 Diabetes: LABS-2 participants with and without type 2 diabetes undergoing gastric bypass were enrolled to assess control of appetite and blood glucose before surgery as well as 6 months and 2 years after surgery. Participating sites include Oregon Health Sciences University/Legacy Hospital, University of Pittsburgh, and University of Washington/Virginia Mason.
**LABS-3 Psychosocial:**LABS-2 participants from three sites were enrolled for assessment of psychological factors, eating patterns, and quality of life before surgery and each year after the bariatric surgery was performed. Participating sites include Columbia/Cornell University Medical Center, University of Pittsburgh, and Neuropsychiatric Institute.
Physical Activity & related terms
Physical Activity: Bodily activity that enhances or maintains physical fitness and overall health and wellness.
Related:
Body Composition: Describes the percentages of fat, bone, and muscle in a human body.
Body fat percentage: The weight of a person’s fat divided by their total body weight. This measurement consists of essential body fat (fat required to maintain life and reproductive function) and storage body fat (fat accumulation in tissue, part of which protects organs).
Body Mass Index: A measure of body fat based on height and weight that applies to adult men and women. (www.nhlbisupport.com)
Bone Density: A measurement of the density of minerals (such as calcium) in your bones. This information estimates how strong your bones are.
Exercise: Specifically planned, structured physical activity which is usually done in order to improve cardiovascular fitness, gain strength, expend calories, and gain other benefits.
Exercises are generally classified as:
Flexibility: Exercise to improve the range of motion of muscles and joints – stretching, yoga.
Aerobic: Exercises that focus on increasing the heart rate – running, cycling, swimming.
Anaerobic: Exercise to increase muscle strength – weight training.
Intensity: the magnitude of the effort (i.e., exertion) required to perform the physical activity.
Intensity is generally classified as:
Moderate-intensity PA (MPA): Generally equivalent to a brisk walk and noticeably accelerates the heart rate,
Vigorous-intensity PA (VPA): Activity that causes a substantial increase in heart rate and rapid breathing.
Low-intensity PA (LPA): Activity performed at a lower intensity than MPA, but higher than sedentary activities, which require almost no physical movement.
MET (Metabolic Equivalent) – A common method to determine physical activity in research settings is to measure individuals’ oxygen demand during physical activity and divide it by their oxygen demand at rest. One’s oxygen demand at rest equals 1 Metabolic Equivalent (MET). An activity that requires 3 times as much oxygen as rest equals 3 METS. Using this methods moderate-intensity physical activity is defined as physical activity done at 3.0 to 6.0 METs.
Lean Body Mass: The mass of the body minus the fat. Doctor may use underwater weighing, BOD POD (a computerized chamber), skin calipers or bioelectric impedance analysis (BIA) to determine lean body mass.