Metabolic equivalent (MET) intensities of culturally-specific physical activities performed by New Zealanders.

AIMS This study's purpose was to objectively measure the intensity, expressed as metabolic equivalents (METs), of free-living physical activities (PAs) performed by New Zealanders. METHODS A sample of 186 European/Other (n=60), Maori (n=61), and Pacific (n=65) males and females (mean age 48.6 plus or minus 16.4 yrs) underwent 3 days of minute-by-minute heart rate monitoring (HRM) with individual calibration on a cycle ergometer. Mean METs were derived from average heart rate readings and compared to published equivalents from the United States (US) Compendium of Physical Activities. RESULTS Although New Zealand-derived METs were slightly higher, comparison to the US instrument showed strong correlations (R2=0.62). Overall intensities for Maori kapahaka PAs ranged from 4.3 to 7.1 METs, and were generally classified as vigorous- and moderate-intensity for males and females, respectively. In addition to 12 New Zealand Maori and Pacific activities, 5 PAs captured during HRM are not found in the US Compendium, and New Zealand-derived METs for 9 PAs were classified differently from the US instrument. CONCLUSIONS Availability of New Zealand-specific MET intensities increases the precision of estimating energy expenditure and PA levels when direct measures are not possible. PA surveillance in New Zealand is further enhanced by the ability to substitute culturally-specific examples of intensity when necessary.

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

[2]  J F Sallis,et al.  Compendium of physical activities: classification of energy costs of human physical activities. , 1993, Medicine and science in sports and exercise.

[3]  Jacob Cohen Statistical Power Analysis for the Behavioral Sciences , 1969, The SAGE Encyclopedia of Research Design.

[4]  A. Prentice,et al.  The use of heart rate monitoring in the estimation of energy expenditure: a validation study using indirect whole-body calorimetry , 1989, British Journal of Nutrition.

[5]  Heart rate monitoring as a field method for estimating energy expenditure as evaluated by the doubly labeled water method. , 1999, Journal of nutritional science and vitaminology.

[6]  M. Booth,et al.  Assessment of Physical Activity: An International Perspective , 2000, Research quarterly for exercise and sport.

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

[8]  R. Shephard Limits to the measurement of habitual physical activity by questionnaires , 2003, British journal of sports medicine.

[9]  E. Sobngwi,et al.  Development and validation of a questionnaire for the assessment of physical activity in epidemiological studies in Sub-Saharan Africa. , 2001, International journal of epidemiology.

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

[11]  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.

[12]  B E Ainsworth,et al.  Evaluation of heart rate as a method for assessing moderate intensity physical activity. , 2000, Medicine and science in sports and exercise.

[13]  M. Szklo,et al.  Epidemiology: Beyond the Basics , 1999 .

[14]  Barrie Gordon,et al.  Active for Life: A Call for Action , 1998 .

[15]  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.

[16]  E. Howley Type of activity: resistance, aerobic and leisure versus occupational physical activity. , 2001, Medicine and science in sports and exercise.

[17]  P Deurenberg,et al.  The assessment of 24-hour energy expenditure in elderly women by minute-by-minute heart rate monitoring. , 1997, Annals of nutrition & metabolism.

[18]  Y Schutz,et al.  Assessment of free-living physical activity in humans: an overview of currently available and proposed new measures. , 2001, Obesity research.

[19]  M. Livingstone,et al.  Simultaneous measurement of free-living energy expenditure by the doubly labeled water method and heart-rate monitoring. , 1990, The American journal of clinical nutrition.

[20]  K. Patrick,et al.  Physical Activity and Public Health: A Recommendation From the Centers for Disease Control and Prevention and the American College of Sports Medicine , 1995 .

[21]  W. Sinning,et al.  Y's Way to Physical Fitness: The Complete Guide to Fitness Testing and Instruction , 1989 .

[22]  P. Ritz,et al.  Critical evaluation of the factorial and heart-rate recording methods for the determination of energy expenditure of free-living elderly people , 1997, British Journal of Nutrition.

[23]  N. Wareham,et al.  Estimating energy expenditure by heart-rate monitoring without individual calibration. , 2001, Medicine and science in sports and exercise.

[24]  A. Hardman Physical activity and health: current issues and research needs. , 2001, International journal of epidemiology.

[25]  K. Berg,et al.  Validation of a cycle ergometry equation for predicting steady-rate VO2. , 1993, Medicine and science in sports and exercise.

[26]  Henry J. Montoye,et al.  Measuring physical activity and energy expenditure , 1996 .

[27]  W L Haskell,et al.  Seven-day activity and self-report compared to a direct measure of physical activity. , 1984, American journal of epidemiology.