BACKGROUND: It is important to assess physical activity objectively during daily life circumstances, to understand the association between physical activity and diseases and to determine the effectiveness of interventions. Accelerometer-based physical activity monitoring seems a promising method and could potentially capture all four FITT (i.e. Frequency, Intensity, Time, Type) components of physical activity considered by the World Health Organization (WHO). AIM: To assess the four FITT components of physical activity with an accelerometer during daily life circumstances and compare with self-reported levels of physical activity in @entity1 with @entity626 ( @entity571 ) and a healthy control group. METHODS: @entity1 (n=30) with end-stage knee @entity571 and age-matched healthy subjects (n=30) were measured. An ambulant tri-axial accelerometer was placed onto the lateral side of the upper leg. Physical activity was measured during four consecutive days. Using algorithm-based peak detection methods in Matlab, parameters covering the four FITT components were assessed. Self-reported physical activity was assessed using the Short questionnaire to assess health enhancing physical activity (SQUASH). RESULTS: Knee @entity571 @entity1 demonstrated fewer walking bouts (154   79 versus 215   65 resp.; p=0.002), step counts (4402   2960 steps/day versus 6943   2581 steps/day; p=0.001) and sit-to-stand (STS) transfers (37   14 versus 44   12; p=0.031) compared to controls. Knee @entity571 @entity1 demonstrated more time sitting (65   15% versus 57   10% resp.; p=0.029), less time walking (8   4% versus 11   4% resp.; p=0.014) and lower walking cadence (87   11steps/min versus 99    8steps/min resp.; p<0.001). Accelerometer-based parameters of physical activity were moderately-strong (Pearsons's r= 0.28-0.49) correlated to self-reported SQUASH scores. CONCLUSION: A single ambulant accelerometer-based physical activity monitor feasibly captures the four FITT components of physical activity and provides more insight into the actual physical activity behavior and limitations of knee @entity571 @entity1 in their daily life.

Accelerometer-based Physical Activity Monitoring in XXXX with @entity626 : Objective and Ambulatory Assessment of Actual Physical Activity During Daily Life Circumstances.

@entity1 :: ('9606', 'Species') :: ['patients', 'Patients'] @entity626 :: ('MESH:D020370', 'Disease') :: ['knee osteoarthritis'] @entity571 :: ('MESH:D010003', 'Disease') :: ['OA']
@entity1 :: (9606,Species) :: ['Patients']
