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Impact Of Accelerometer Data Processing Decisions On The Sample Size, Wear Time And Physical Activity Level Of A Large Cohort Study, Sarah Kozey Keadle, Eric Shiroma, Patty Freedson, I-Min Lee
Impact Of Accelerometer Data Processing Decisions On The Sample Size, Wear Time And Physical Activity Level Of A Large Cohort Study, Sarah Kozey Keadle, Eric Shiroma, Patty Freedson, I-Min Lee
Patty S. Freedson
Background Accelerometers objectively assess physical activity (PA) and are currently used in several large-scale epidemiological studies, but there is no consensus for processing the data. This study compared the impact of wear-time assessment methods and using either vertical (V)-axis or vector magnitude (VM) cut-points on accelerometer output. Methods Participants (7,650 women, mean age 71.4 y) were mailed an accelerometer (ActiGraph GT3X+), instructed to wear it for 7 days, record dates and times the monitor was worn on a log, and return the monitor and log via mail. Data were processed using three wear-time methods (logs, Troiano or Choi algorithms) and …
Calibrating A Novel Multi-Sensor Physical Activity Measurement System, D. John, S. Liu, J. Saski, C. Howe, J. Staudenmayer, R. Gao, Patty Freedson
Calibrating A Novel Multi-Sensor Physical Activity Measurement System, D. John, S. Liu, J. Saski, C. Howe, J. Staudenmayer, R. Gao, Patty Freedson
Patty S. Freedson
Advancing the field of physical activity (PA) monitoring requires the development of innovative multi-sensor measurement systems that are feasible in the free-living environment. The use of novel analytical techniques to combine and process these multiple sensor signals is equally important. This paper, describes a novel multi-sensor ‘Integrated PA Measurement System’ (IMS), the lab-based methodology used to calibrate the IMS, techniques used to predict multiple variables from the sensor signals, and proposes design changes to improve the feasibility of deploying the IMS in the free-living environment. The IMS consists of hip and wrist acceleration sensors, two piezoelectric respiration sensors on the …
A Photovoice Participatory Evaluation Of A School Gardening Program Through The Eyes Of Fifth Graders, Catherine Sands, Krista Harper, Lee Ellen Reed, Maggie Shar
A Photovoice Participatory Evaluation Of A School Gardening Program Through The Eyes Of Fifth Graders, Catherine Sands, Krista Harper, Lee Ellen Reed, Maggie Shar
Krista M. Harper
In the springtime, fifth grade students at the Williamsburg Elementary School in rural Western Massachusetts ask to snack on sorrel and chives from the school garden, between planting potatoes and building a shade structure for their outdoor classroom. They are members of the first cohort of the curriculum-integrated program initiated by Fertile Ground, a grassroots organization in western Massachusetts. The children’s delight in the fresh greens they have grown marks a national phenomenon: the farm-to-school movement. With limited resources, parents, teachers, students, administrators, and community activists are developing inroads to better school food and food education, by constructing school teaching …