A new heart rate variability-based method for the estimation of oxygen consumption without individual laboratory calibration: application example on postal workers.

Traditionally, the estimation of oxygen consumption (VO2) at work using heart rate (HR) has required the determination of individual HR/VO2 calibration curves in a separate exercise test in a laboratory (VO2-TRAD). Recently, a new neural network-, and heart rate variability-based method has been developed (Firstbeat PRO heartbeat analysis software) for the estimation of VO2 without individual calibration (VO2-HRV). In the present study, the VO2-values by the VO2-HRV were compared with the values by VO2-TRAD in 22 postal workers. Within individuals the correlation between the two methods was high (range 0.80-0.99). The VO2-TRAD gave higher values of VO2 compared to VO2-HRV (19%) especially during low physical activity work when non-metabolic factors may increase HR. When assessed in different HR categories, the smallest difference (11%), and highest correlations (range 0.83-0.99) in VO2 between the methods were observed at higher HR levels. The results indicate that the VO2-HRV is a potentially useful method to estimate VO2 in the field without laboratory calibration.

[1]  P. Grossman.  Respiration, stress, and cardiovascular function. , 1983, Psychophysiology.

[2]  K. Short,et al.  Excess postexercise oxygen consumption and recovery rate in trained and untrained subjects. , 1997, Journal of applied physiology.

[3]  Z Vokac,et al.  Oxygen uptake/heart rate relationship in leg and arm exercise, sitting and standing. , 1975, Journal of applied physiology.

[4]  Z Vokac,et al.  Circulatory strain, estimated energy output and catecholamine excretion in Norwegian coastal fishermen. , 1974, Ergonomics.

[5]  A S Jackson,et al.  Prediction of functional aerobic capacity without exercise testing. , 1990, Medicine and science in sports and exercise.

[6]  Alan V. Oppenheim,et al.  Discrete-Time Signal Pro-cessing , 1989 .

[7]  J. Furedy,et al.  Mental challenge elicits "additional" increases in heart rate during low and moderate intensity cycling. , 1994, International journal of psychophysiology : official journal of the International Organization of Psychophysiology.

[8]  P. D. di Prampero,et al.  Kinetics of cardiac output and respiratory gas exchange during exercise and recovery. , 1972, Journal of applied physiology.

[9]  P. Deurenberg,et al.  A critical evaluation of heart rate monitoring to assess energy expenditure in individuals. , 1993, The American journal of clinical nutrition.

[10]  A. Prentice,et al.  Energy expenditure from minute-by-minute heart-rate recording: comparison with indirect calorimetry. , 1988, The American journal of clinical nutrition.

[11]  Giuseppe Baselli,et al.  The influence of exercise intensity on the power spectrum of heart rate variability , 2004, European Journal of Applied Physiology and Occupational Physiology.

[12]  Aki Pulkkinen,et al.  On- and Off-dynamics and Respiration Rate Enhance the Accuracy of Heart Rate Based VO2 Estimation , 2004 .

[13]  Aki Pulkkinen,et al.  Energy Expenditure Can Be Accurately Estimated From HR Without Individual Laboratory Calibration: 586 Board #177 3:30 PM ??? 5:00 PM , 2005 .

[15]  R. Grucza,et al.  Kinetics of cardiorespiratory response to dynamic and rhythmic — static exercise in men , 2004, European Journal of Applied Physiology and Occupational Physiology.

[16]  P. Thompson,et al.  ACSM's Guidelines for Exercise Testing and Prescription , 1995 .

[17]  Saalasti Sami,et al.  ARTEFACT CORRECTION FOR HEART BEAT INTERVAL DATA , 2004 .

[18]  J. K. Moon,et al.  Combined heart rate and activity improve estimates of oxygen consumption and carbon dioxide production rates. , 1996, Journal of applied physiology.

[19]  J. E. Hansen,et al.  Relation of oxygen uptake to work rate in normal men and men with circulatory disorders. , 1987, The American journal of cardiology.

[20]  W P James,et al.  Assessment of the heart-rate method for determining energy expenditure in man, using a whole-body calorimeter , 1979, British Journal of Nutrition.

[21]  K R Westerterp,et al.  Comparison of energy expenditure by the doubly labeled water technique with energy intake, heart rate, and activity recording in man. , 1989, The American journal of clinical nutrition.

[22]  T. Seppänen,et al.  Quantitative beat-to-beat analysis of heart rate dynamics during exercise. , 1996, The American journal of physiology.

[23]  Arsenio Veicsteinas,et al.  Heart rate variability and autonomic activity at rest and during exercise in various physiological conditions , 2003, European Journal of Applied Physiology.

[24]  O. Bar-or,et al.  Climate-related corrections for improved estimation of energy expenditure from heart rate in children. , 1995, Journal of applied physiology.

[25]  T. Bernard,et al.  Relationships between oxygen consumption and heart rate in transitory and steady states of exercise and during recovery: influence of type of exercise , 1997, European Journal of Applied Physiology and Occupational Physiology.

[26]  S. Bot,et al.  The relationship between heart rate and oxygen uptake during non-steady state exercise , 2000, Ergonomics.

[27]  P. Robson,et al.  Energy expenditure by heart rate in children: an evaluation of calibration techniques. , 2000, Medicine and science in sports and exercise.

[28]  H. Rusko,et al.  Intraindividual validation of heart rate variability indexes to measure vagal effects on hearts. , 2006, American journal of physiology. Heart and circulatory physiology.

[29]  Sami Saalasti,et al.  Neural networks for heart rate time series analysis , 2003 .