Validation of a computerized 24-hour physical activity recall (24PAR) instrument with pattern-recognition activity monitors.
OBJECTIVE
The purpose of this study was to examine the validity of a computerized 24-hour physical activity recall instrument (24PAR).


METHODS
Participants (n=20) wore 2 pattern-recognition activity monitors (an IDEEA and a SenseWear Pro Armband) for a 24-hour period and then completed the 24PAR the following morning. Participants completed 2 trials, 1 while maintaining a prospective diary of their activities and 1 without a diary. The trials were counterbalanced and completed within a week from each other. Estimates of energy expenditure (EE) and minutes of moderate-to-vigorous physical activity (MVPA) were compared with the criterion measures using 3-way (method by gender by trial) mixed-model ANOVA analyses.


RESULTS
For EE, pairwise correlations were high (r>.88), and there were no differences in estimates across methods. Estimates of MVPA were more variable, but correlations were still in the moderate to high range (r>.57). Average activity levels were significantly higher on the logging trial, but there was no significant difference in the accuracy of self-report on days with and without logging.


CONCLUSIONS
The results of this study support the overall utility of the 24PAR for group-level estimates of daily EE and MVPA.
Department of Kinesiology, Iowa State University, Ames, IA 50011, USA.
Miguel A
MA
Calabro
Gregory J
GJ
Welk
Alicia L
AL
Carriquiry
Sarah M
SM
Nusser
Nicholas K
NK
Beyler
Charles E
CE
Mathews
D000328:Adult; D000704:Analysis of Variance; D003198:Computer Simulation; D004734:Energy Metabolism; D005260:Female; D006801:Humans; D008297:Male; D011939:Mental Recall; D008991:Monitoring, Physiologic / Q000295:instrumentation / Q000379:methods*; D009043:Motor Activity; D011446:Prospective Studies; D012647:Self-Assessment; D013223:Statistics as Topic