PURPOSE OF REVIEW: The relationship between physical activity and health varies considerably, partly due to the difficulty of assessing physical activity accurately. This review examines recent literature on the validation of movement sensors to assess habitual physical activity. Recommendations are given for the use of movement sensors during free-living conditions and methods of data analysis and interpretation are discussed. RECENT FINDINGS: Recent progress in physical-activity research includes detailed comparative studies of different monitor brands. The move away from using linear-regression equations and the use of novel data-analysis strategies is increasing the accuracy with which energy expenditure can be estimated from accelerometry. New technologies, including the combination of accelerometry with the measurement of physiological parameters, have great potential for the increased accuracy of physical-activity assessment. SUMMARY: Accelerometry is able to adequately assess physical activity and its association with health outcomes but currently methods have limited accuracy for the estimation of free-living energy expenditure. Pedometers provide an inexpensive overall measure of physical activity but are unable to assess intensity, frequency and duration of activity or to estimate energy expenditure. Interpretation of monitor output is best kept as close to the measurement domain as possible.
PURPOSE OF REVIEW: The relationship between physical activity and health varies considerably, partly due to the difficulty of assessing physical activity accurately. This review examines recent literature on the validation of movement sensors to assess habitual physical activity. Recommendations are given for the use of movement sensors during free-living conditions and methods of data analysis and interpretation are discussed. RECENT FINDINGS: Recent progress in physical-activity research includes detailed comparative studies of different monitor brands. The move away from using linear-regression equations and the use of novel data-analysis strategies is increasing the accuracy with which energy expenditure can be estimated from accelerometry. New technologies, including the combination of accelerometry with the measurement of physiological parameters, have great potential for the increased accuracy of physical-activity assessment. SUMMARY: Accelerometry is able to adequately assess physical activity and its association with health outcomes but currently methods have limited accuracy for the estimation of free-living energy expenditure. Pedometers provide an inexpensive overall measure of physical activity but are unable to assess intensity, frequency and duration of activity or to estimate energy expenditure. Interpretation of monitor output is best kept as close to the measurement domain as possible.
Authors: Jessica L Unick; Dale S Bond; John M Jakicic; Sivamainthan Vithiananthan; Beth A Ryder; G Dean Roye; Dieter Pohl; Jennifer Trautvetter; Rena R Wing Journal: Obes Surg Date: 2012-03 Impact factor: 4.129
Authors: Sydney A Jones; Kelly R Evenson; Larry F Johnston; Stewart G Trost; Carmen Samuel-Hodge; David A Jewell; Jennifer L Kraschnewski; Thomas C Keyserling Journal: J Sci Med Sport Date: 2014-01-01 Impact factor: 4.319
Authors: Dale S Bond; John M Jakicic; Sivamainthan Vithiananthan; J Graham Thomas; Tricia M Leahey; Harry C Sax; Dieter Pohl; G D Roye; Beth A Ryder; Rena R Wing Journal: Surg Obes Relat Dis Date: 2009-09-10 Impact factor: 4.734