Estimating physical activity using the CSA accelerometer and a physical activity log.

摘要: Purpose To compare two methods for measuring time spent in physical activity of differing absolute intensities. Methods Over a 7-d period, 59 women wore Computer Science and Applications, Inc. (CSA) accelerometers recorded their logs (PAL) at 15-min intervals. Three published cut points were used to classify CSA data into resting/light, moderate, vigorous intensity categories. Data analyzed using descriptive statistics, Spearman rank-order correlations, Bland-Altman plots. Results The estimates total (moderate plus vigorous) the three ranged from mean (+/- SD) 38.1 (+/-26.8) min.d-1 312.6 101.1) min.d-1. Using PAL, self-reported 75.1 51.7) activity. There was fair modest agreement between each measures PAL measure activity, with correlations ranging r = 0.15 0.24. Correlations higher body mass index values (BMI) below 25 kg.m-2 (r 0.23-0.38) compared BMI > or 0.06-0.08) but did not differ according age. 0.45 0.86. Conclusions designed output by level produced different participation. overall among leaner women.