In a field setting, we compared a physical activity questionnaire (SQUASH), a 24-hour recall measure (Physical Activity Scale; PAS), and an accelerometer to: (1) quantify the amount of time spent in light, moderate, and vigorous physical activity; (2) calculate activity scores; and (3) categorize participants by physical activity tertiles. For 7 consecutive days, 103 participants (61% males, 39% females; mean age 36.8 years, mean body mass index 26.6 kg.m(-2)) wore an accelerometer and completed the PAS. Immediately before these 7 days, the participants completed the SQUASH and underwent anthropometric measurements (weight and height). Time spent in light (<3>= 6 METs) activity was calculated. Significant correlations were observed between the PAS and accelerometer in the population as a whole (r = 0.66, PPPPPPlimited.
Kwak, L., Kremers, S. P. J., Brug, J., & van Baak, M. A. (2007). Measuring physical activity in field studies: Comparison of a questionnaire, 24h recall and accelerometer. European Journal of Sport Science, 7(4), 193-201. https://doi.org/10.1080/17461390701674088