A comparison between ventilation and heart rate as indicator of oxygen uptake during different intensities of exercise.

The aim of this study is to compare the relation between ventilation (VE) and oxygen uptake (VO2) [VO2=ƒ(VE)] and between heart rate (HR) and VO2 [VO2=ƒ(HR)]. Each one of the subjects performed three types of activities of different intensities (walking without load, walking with load and intermittent work). VO2, VE, and HR were measured continuously by using indirect calorimetry and an electrocardiogram. Linear regressions and coefficients of determination (r(2)) were calculated to compare the relation VO2 =ƒ(VE) and VO2 =ƒ(HR) for two different regroupings: by session duration (r(2) session) and by subject (r(2) subject). Results showed that r(2) session of the relation VO2 =ƒ(VE) were significantly higher than those of the relation VO2 =ƒ(HR) for steady state activities (walking with or without load during 3 or 6 min, p < 0.01) and for activities without oxygen consumption steady state (walking with or without load during 1 min, p < 0.01 and intermittent work, p < 0.05). VE is more strongly correlated with VO2 than with HR. This is a very promising approach to develop a new method to estimate energy expenditure. Key pointsVentilation is more strongly correlated with oxygen uptake than heart rate during physical activities of different intensities.This study shows the interest to looking for ventilation to estimate energy expenditure.This study is a promising approach to develop a new method to estimate energy expenditureAn interesting perspective could be to develop a light and portable device to measure ventilation based on the coupling of four magnetometers.

[1]  J. Durnin,et al.  Pulmonary ventilation as an index of energy expenditure. , 1955, Quarterly journal of experimental physiology and cognate medical sciences.

[2]  G. Brooks,et al.  Contributions of working muscle to whole body lipid metabolism are altered by exercise intensity and training. , 2007, American journal of physiology. Endocrinology and metabolism.

[3]  K R Westerterp,et al.  Assessment of physical activity level in relation to obesity: current evidence and research issues. , 1999, Medicine and science in sports and exercise.

[4]  M. Garet,et al.  Estimating relative physical workload using heart rate monitoring: a validation by whole-body indirect calorimetry , 2005, European Journal of Applied Physiology.

[5]  K. Westerterp,et al.  Physical Activity Assessment With Accelerometers: An Evaluation Against Doubly Labeled Water , 2007, Obesity.

[6]  B. Franklin,et al.  Comparison of cardioprotective benefits of vigorous versus moderate intensity aerobic exercise. , 2006, The American journal of cardiology.

[7]  J H Wilmore,et al.  Anaerobic threshold and maximal aerobic power for three modes of exercise. , 1976, Journal of applied physiology.

[8]  P. Åstrand,et al.  A nomogram for calculation of aerobic capacity (physical fitness) from pulse rate during sub-maximal work. , 1954, Journal of applied physiology.

[9]  S A Ward,et al.  Cardiopulmonary coupling during exercise. , 1982, The Journal of experimental biology.

[10]  Hampshire Gu.  Heart rate and oxygen uptake relationship: a comparison of loaded marching and running in women , 1995 .

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

[12]  Margaret L Fruin,et al.  Validity of a multi-sensor armband in estimating rest and exercise energy expenditure. , 2004, Medicine and science in sports and exercise.

[13]  B E Ainsworth,et al.  Compendium of physical activities: an update of activity codes and MET intensities. , 2000, Medicine and science in sports and exercise.

[14]  U. Ekelund,et al.  Reliability and validity of the combined heart rate and movement sensor Actiheart , 2005, European Journal of Clinical Nutrition.

[15]  B E Ainsworth,et al.  Validity of four motion sensors in measuring moderate intensity physical activity. , 2000, Medicine and science in sports and exercise.

[16]  P S Freedson,et al.  Physical activity assessment: a review of methods. , 1996, Critical reviews in food science and nutrition.

[17]  Søren Brage,et al.  Accelerometers and pedometers: methodology and clinical application , 2007, Current opinion in clinical nutrition and metabolic care.

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

[19]  E. Ravussin,et al.  Déterminants et contrôle des dépenses énergétiques , 2002 .

[20]  A. Jeukendrup,et al.  Heart Rate Monitoring , 2003, Sports medicine.

[21]  Charlie Potter,et al.  Comparison of activity monitors to estimate energy cost of treadmill exercise. , 2004, Medicine and science in sports and exercise.

[22]  A HENSCHEL,et al.  Maximal oxygen intake as an objective measure of cardio-respiratory performance. , 1955, Journal of applied physiology.

[23]  S. Spiro.  Exercise testing in clinical medicine. , 1977, British journal of diseases of the chest.

[24]  A. B. Ford,et al.  Estimation of energy expenditure from pulmonary ventilation. , 1959, Journal of applied physiology.

[25]  W. Haskell,et al.  Simultaneous measurement of heart rate and body motion to quantitate physical activity. , 1993, Medicine and science in sports and exercise.

[26]  K N Maruthy,et al.  A simple method of measuring total daily energy expenditure and physical activity level from the heart rate in adult men , 2006, European Journal of Clinical Nutrition.

[27]  J S Smith,et al.  Free-living energy expenditure of adult men assessed by continuous heart-rate monitoring and doubly-labelled water , 1997, British Journal of Nutrition.

[28]  J. Morris,et al.  Assessment of physical activity, and physical fitness, in population surveys. , 1992, Journal of epidemiology and community health.

[29]  U. Ekelund,et al.  Comparison of PAEE from combined and separate heart rate and movement models in children. , 2005, Medicine and science in sports and exercise.

[30]  B. Saltin,et al.  Maximal oxygen uptake in athletes. , 1967, Journal of applied physiology.

[31]  F Trudeau,et al.  Estimation of energy expenditure in a work environment: Comparison of accelerometry and oxygen consumption/heart rate regression , 2008, Ergonomics.

[32]  Brian J. Whipp,et al.  Respiratory Control During Exercise , 2011 .

[33]  R. Laukkanen,et al.  Use of heart rate to predict energy expenditure from low to high activity levels. , 2003, International journal of sports medicine.

[34]  J. Sallis.  Measuring Physical Activity and Energy Expenditure , 1996 .

[35]  K. Ebi,et al.  Tidal volume and respiratory timing derived from a portable ventilation monitor. , 2002, Chest.

[36]  L B Sardinha,et al.  Comparison of equations for predicting energy expenditure from accelerometer counts in children , 2008, Scandinavian journal of medicine & science in sports.

[37]  Wim H. M. Saris,et al.  Measuring Physical Activity and Energy Expenditure , 1996 .

[38]  W L Beaver,et al.  Gas exchange theory and the lactic acidosis (anaerobic) threshold. , 1990, Circulation.

[39]  J. Mitchell,et al.  Neural control of cardiovascular responses and of ventilation during dynamic exercise in man. , 1993, The Journal of physiology.