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Chris Stauffer10
Estimated H-index: 10
(Massachusetts Institute of Technology),
W.E.L. Grimson10
Estimated H-index: 10
(Massachusetts Institute of Technology)
Our goal is to develop a visual monitoring system that passively observes moving objects in a site and learns patterns of activity from those observations. For extended sites, the system will require multiple cameras. Thus, key elements of the system are motion tracking, camera coordination, activity classification, and event detection. In this paper, we focus on motion tracking and show how one can use observed motion to learn patterns of activity in a site. Motion segmentation is based on an a...
Ref 25Cited 2922 Download Pdf Cite this paper
Kelly R. Evenson9
Estimated H-index: 9
(University of North Carolina at Chapel Hill),
Michelle M. Goto1
Estimated H-index: 1
(University of North Carolina at Chapel Hill),
Robert D. Furberg8
Estimated H-index: 8
(Research Triangle Park)
Background Consumer-wearable activity trackers are electronic devices used for monitoring fitness- and other health-related metrics. The purpose of this systematic review was to summarize the evidence for validity and reliability of popular consumer-wearable activity trackers (Fitbit and Jawbone) and their ability to estimate steps, distance, physical activity, energy expenditure, and sleep.
Ref 57Cited 234 Download Pdf Cite this paper
Steve Kelder9
Estimated H-index: 9
(University of Texas Health Science Center at Houston),
Cheryl L. Perry10
Estimated H-index: 10
(University of Texas Health Science Center at Houston),
Knut-Inge Klepp4
Estimated H-index: 4
(University of Texas Health Science Center at Houston)
... more
OBJECTIVES. A major assumption underlying youth health promotion has been that physiological risk factors track from childhood into adulthood. However, few studies have systematically examined how behaviors change during adolescence. This paper describes longitudinal tracking of adolescent health behaviors in two Minnesota Heart Health Program communities. METHODS. Beginning in sixth grade (1983), seven annual waves of behavioral measurements were taken from both communities (baseline n = 2376)....
Ref 17Cited 1096 Source Cite this paper
Jeffer Eidi Sasaki8
Estimated H-index: 8
(University of Massachusetts Amherst),
Amanda Hickey7
Estimated H-index: 7
,
Marianna Mavilia5
Estimated H-index: 5
... more
Objective: The purpose of this study was to examine the accuracy of the Fitbit wireless activity tracker in assessing energy expenditure (EE) for different activities. Methods: Twenty participants (10 males, 10 females) wore the Fitbit Classic wireless activity tracker on the hip and the Oxycon Mobile portable metabolic system (criterion). Participants performed walking and running trials on a treadmill and a simulated free-living activity routine. Paired t tests were used to test for difference...
Ref 15Cited 50 Source Cite this paper
Risto Telama10
Estimated H-index: 10
,
Xiaolin Yang9
Estimated H-index: 9
,
Jorma Viikari10
Estimated H-index: 10
(University of Turku)
... more
Background The aim of this study was to investigate stability of physical activity from childhood and adolescence to adulthood in multiple age cohorts, and analyze how well adult physical activity can be predicted by various physical activity variables measured in childhood and adolescence. Methods The data were drawn from the Cardiovascular Risk in Young Finns Study. The study was started in 1980, when cohorts of randomly sampled boys and girls aged 3, 6, 9, 12, 15, and 18 years (total of 2309 ...
Ref 32Cited 986 Download Pdf Cite this paper
Daniel H. Wilson9
Estimated H-index: 9
(Carnegie Mellon University),
Christopher G. Atkeson10
Estimated H-index: 10
(Carnegie Mellon University)
In this paper we introduce the simultaneous tracking and activity recognition (STAR) problem, which exploits the synergy between location and activity to provide the information necessary for automatic health monitoring. Automatic health monitoring can potentially help the elderly population live safely and independently in their own homes by providing key information to caregivers. Our goal is to perform accurate tracking and activity recognition for multiple people in a home environment. We us...
Ref 76Cited 259 Download Pdf Cite this paper
Thea Kooiman3
Estimated H-index: 3
(Hanze University of Applied Sciences),
Manon L. Dontje10
Estimated H-index: 10
(Hanze University of Applied Sciences),
Siska R. Sprenger1
Estimated H-index: 1
... more
Activity trackers can potentially stimulate users to increase their physical activity behavior. The aim of this study was to examine the reliability and validity of ten consumer activity trackers for measuring step count in both laboratory and free-living conditions.
Ref 32Cited 105 Download Pdf Cite this paper
Russell R. Pate10
Estimated H-index: 10
,
Tom Baranowski9
Estimated H-index: 9
,
Marsha Dowda10
Estimated H-index: 10
... more
ABSTRACT The purpose of this study was to determine whether physical activity behavior tracks during early childhood. Forty-seven children (22 males, 25 females) aged 3-4 yr at the beginning of the study were followed over a 3-yr period. Heart rates were measured at least 2 and up to 4 d·yr-1 with a Quantum XL Telemetry heart rate monitor. Physical activity was quantified as the percentage of observed minutes between 3:00 and 6:00 p.m. during which heart rate was 50% or more above individual res...
Ref 19Cited 246 Source Cite this paper
Keith M. Diaz7
Estimated H-index: 7
(Columbia University Medical Center),
David J. Krupka4
Estimated H-index: 4
(Columbia University Medical Center),
Melinda J. Chang4
Estimated H-index: 4
(Columbia University Medical Center)
... more
Although physicians recognize the importance of physical activity in the prevention and maintenance of chronic diseases,1 few incorporate physical activity counseling into routine clinic visits.2 One major barrier has been the paucity of means to objectively assess patient’s long-term physical activity patterns.3 We investigated if the Fitbit®, one of the most common wireless physical activity trackers in the consumer market, met reasonable validity and reliability standards such that they could...
Ref 3Cited 108 Source Cite this paper
Kathleen F. Janz9
Estimated H-index: 9
,
Jeffrey D. Dawson8
Estimated H-index: 8
,
Larry T. Mahoney10
Estimated H-index: 10
JANZ, K. F., J. D. DAWSON, and L. T. MAHONEY. Tracking physical fitness and physical activity from childhood to adolescence: the Muscatine study. Med. Sci. Sports Exerc., Vol. 32, No. 7, pp. 1250 ‐1257, 2000. Purpose: Physical fitness and physical activity tracking data enhance our understanding as to when children settle into their long-term exercise and fitness patterns and, therefore, provide insight as to when programs focusing on preventing sedentary adults behaviors should be initiated. Me...
Ref 24Cited 323 Download Pdf Cite this paper