A Summary and Critical Evaluation of Two Methods of Measuring PA and SB

Abstract

This paper evaluates two methods for measuring physical activity (PA) and sedentary behavior (SB): the Omron pedometer (objective) and the International Physical Activity Questionnaire-Short Form (IPAQ-SF, subjective). The pedometer offers portability and accuracy in step counting but risks reactivity and data manipulation. The IPAQ-SF is cost-effective for large samples but suffers from recall bias and overestimation of activity levels. Recommendations include combining tools to mitigate limitations and extending trial durations to reduce reactivity. Both methods, despite flaws, remain valuable for health-related assessments when contextually applied.