several recent larger trials in primary care confirm the positive effects of pedometer-based PA counseling, these studies also show that the effectiveness of these interventions is far from optimal (Harris et al., 2015), especially in the long term (Harris et al., 2017; Yates et al., 2017). Therefore, the factors that influence patients' effort to increase and maintain their PA need to be explored and elucidated. Recently, several groups have studied the beliefs, attitudes, behaviors, and experiences of patients participating in PA interventions delivered in a primary care setting (Casey et al., 2014; Wahlich et al., 2017) as well as barriers and facilitators that play a role in changing PA levels (Normansell et al., 2014; Patel, Schofield, Kolt, & Keogh, 2013). Most of these studies used qualitative analysis of interviews with the participants performed after the interventions were completed (Casey et al., 2014; Normansell et al., 2014; Wahlich et al., 2017). While this is a valid and useful approach, it also has its disadvantages as the interviewees might be influenced