Mobile Networks and Applications
Activity sensing in the wild: a field trial of ubifit garden
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
The Mobile Sensing Platform: An Embedded Activity Recognition System
IEEE Pervasive Computing
BALANCE: towards a usable pervasive wellness application with accurate activity inference
Proceedings of the 10th workshop on Mobile Computing Systems and Applications
Using wearable activity type detection to improve physical activity energy expenditure estimation
Proceedings of the 12th ACM international conference on Ubiquitous computing
ADACEM: automatic daily activity and calorie expenditure monitor on mobile phones
Proceedings of the 8th ACM Conference on Embedded Networked Sensor Systems
Accelerometer-based on-body sensor localization for health and medical monitoring applications
Pervasive and Mobile Computing
Healthopia: towards your well-being in everyday life
Proceedings of the 4th International Symposium on Applied Sciences in Biomedical and Communication Technologies
Health promotion as activism: building community capacity to effect social change
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
CoMon: cooperative ambience monitoring platform with continuity and benefit awareness
Proceedings of the 10th international conference on Mobile systems, applications, and services
Improving energy efficiency of personal sensing applications with heterogeneous multi-processors
Proceedings of the 2012 ACM Conference on Ubiquitous Computing
Accurate caloric expenditure of bicyclists using cellphones
Proceedings of the 10th ACM Conference on Embedded Network Sensor Systems
SymPhoney: a coordinated sensing flow execution engine for concurrent mobile sensing applications
Proceedings of the 10th ACM Conference on Embedded Network Sensor Systems
Walk detection and step counting on unconstrained smartphones
Proceedings of the 2013 ACM international joint conference on Pervasive and ubiquitous computing
Ensembles of multiple sensors for human energy expenditure estimation
Proceedings of the 2013 ACM international joint conference on Pervasive and ubiquitous computing
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In 2007, approximately 30% of US adults were obese, with related health care costs exceeding 100 billion dollars. Clearly, the obesity epidemic represents a growing societal concern. One challenge in weight control is the difficulty of tracking food calories consumed and calories expended by activity. This paper presents a system for automatic monitoring of calories expended using a single body-worn accelerometer. Our system uses activity inference combined with signal analysis to estimate calories expended in real-time using regression formulas developed by the American College of Sports Medicine. To validate our system, we have collected data from 51 subjects in a laboratory setting using a treadmill and a more natural field test. Actual caloric expenditure was determined using the medical "gold standard" measurement, of oxygen consumption. We are able to achieve 89% accuracy with lab data and 79% with field data -- both high enough to be useful in practice.