Although a big proportion of HCP reported that they frequently promoted PA, our findings suggest that HCP still perceive structural barriers. The perception and influence of structural barriers differed between professional groups, pointing to the importance of profession specific guidance.

Objective While in the past cancer patients were advised to rest, recent research revealed various beneficial effects of physical activity, including increased treatment tolerability during cancer treatment and prolonged survival, which has led to a paradigm shift in relevant guidelines. This study examined if this paradigm shift from rest to activity has been consolidated in health care professionals' (HCP') attitude. It was investigated if the two dimensions of attitude (rest and activity) are endorsed empirically within the theory of planned behavior (TPB). Differences between physicians and nurses were examined. Methods Five hundred forty seven physicians and 398 nurses treating breast, prostate, or colorectal cancer patients completed a cross‐sectional questionnaire. To assess attitude toward physical activity during cancer treatment, we developed a 15‐item scale, which included original statements of HCP. TPB variables were assessed. Results A factor analysis revealed the proposed distinction of attitude into two dimensions. The activity‐paradigm was stronger represented in HCP' attitude compared with rest‐paradigm (Mactivity‐paradigm = 4.1 versus Mrest‐paradigm = 2.7, p < 0.001). Additionally, the activity‐paradigm had higher exploratory power in explaining intention to recommend physical activity in cancer patients. However, the rest‐paradigm was able to explain intention to recommend physical activity over and above activity‐paradigm (ΔR2 = 0.05). Nurses had higher scores on the rest‐paradigm than physicians. Conclusions The activity‐paradigm has already been consolidated in HCP' minds. However, the rest‐paradigm is still present in the daily routine of oncology physicians and nurses. Addressing concerns and insecurities related to supporting cancer patients in maintaining or building up a physically active lifestyle is a very important educational task.