Authors:
            
                    Sven Feilner
                    
                        
                                1
                            
                    
                    ; 
                
                    Andreas Huber
                    
                        
                                1
                            
                    
                    ; 
                
                    Christian Sauter
                    
                        
                                1
                            
                    
                    ; 
                
                    Dirk Weishäupl
                    
                        
                                2
                            
                    
                    ; 
                
                    Michael Hettchen
                    
                        
                                2
                            
                    
                    ; 
                
                    Wolfgang Kemmler
                    
                        
                                2
                            
                    
                    ; 
                
                    Christian Weigand
                    
                        
                                1
                            
                    
                     and
                
                    Christian Hofmann
                    
                        
                                1
                            
                    
                    
                
        
        
            Affiliations:
            
                    
                        
                                1
                            
                    
                    Fraunhofer Institute for Integrated Circuits IIS, Germany
                
                    ; 
                
                    
                        
                                2
                            
                    
                    Friedrich-Alexander-University Erlangen-Nuremberg, Germany
                
        
        
        
        
        
             Keyword(s):
            Energy Expenditure, Ergospirometry, Wearable Sensors, Activity Tracking, Heart Rate, Respiration Rate, Accelerometry.
        
        
            
                Related
                    Ontology
                    Subjects/Areas/Topics:
                
                        Biomedical Engineering
                    ; 
                        Biomedical Signal Processing
                    ; 
                        Devices
                    ; 
                        Health Information Systems
                    ; 
                        Human-Computer Interaction
                    ; 
                        Monitoring and Telemetry
                    ; 
                        Physiological Computing Systems
                    ; 
                        Wearable Sensors and Systems
                    
            
        
        
            
                Abstract: 
                Energy expenditure is an important parameter during the performance of physical activity. An algorithm is presented calculating the burnt calories by three given parameters: heart rate, respiration rate and movement. These three vital parameters are provided by the FitnessSHIRT system which was developed by the
Fraunhofer IIS. A study was performed to compare the calculated values of the energy expenditure with a reference system based on ergospirometry, an on-body monitoring system and two commercially available activity trackers. Compared to the reference system the developed algorithm, based on the parameters derived by the FitnessSHIRT, reaches a deviation of 18.0 % during running and 18.9 % during cycling.