Individuals with cancer are recommended to engage in regular physical activity (PA) even during cancer therapy. The aim of this study was to explore how patient-reported physician PA counseling influences their PA intention and behavior in addition to psycho-cognitive determinants derived from the theory of planned behavior (TPB). A longitudinal study during cancer treatment was conducted among N = 115 patients with breast, prostate, or colorectal cancer (M_age = 58.0, SD = 11.5; 55.7% female). The median time since diagnosis was 2 months, and 19.1% were diagnosed with metastases. Participants provided information on PA counseling by their physicians and on psycho-cognitive variables of the TPB at three measurement points. Additionally, they wore accelerometers for seven days at baseline and three months later. Nearly half of participants (48%) reported basic PA counseling and 30% reported in-depth PA counseling. Patients in poorer health and with lower education reported significantly less in-depth counseling. In addition to patient self-efficacy in performing PA, only in-depth physician PA counseling, but not basic physician counseling, predicted intention for PA four weeks later. Patients’ PA three months after baseline was predicted by patients’ PA at baseline and their intention for PA. Overall, the PA level at baseline was identified as the most important predictor of PA three months later. Nevertheless, physicians seem to have the ability to increase their cancer patients' intention for PA by in-depth counseling.

建议癌症患者即使在癌症治疗期间也要进行定期的体力活动 (PA)。本研究的目的是探讨除了源自计划行为理论 (TPB) 的心理认知决定因素之外，患者报告的医生 PA 咨询如何影响他们的 PA 意图和行为。在癌症治疗期间对 N = 115 名乳腺癌、前列腺癌或结直肠癌患者进行了一项纵向研究（M_年龄 = 58.0，SD  = 11.5；55.7% 为女性）。诊断后的中位时间为 2 个月，19.1% 被诊断为转移。参与者提供了有关医生进行的 PA 咨询以及 TPB 在三个测量点的心理认知变量的信息。此外，他们在基线时佩戴加速度计 7 天，并在三个月后佩戴。近一半的参与者 (48%) 报告了基本的 PA 咨询，30% 的参与者报告了深入的 PA 咨询。健康状况较差和受教育程度较低的患者报告的深入咨询明显较少。除了患者进行 PA 的自我效能外，只有深入的医生 PA 咨询（而不是基本的医生咨询）才能预测四周后的 PA 意向。基线后三个月患者的 PA 是根据患者基线时的 PA 及其进行 PA 的意图来预测的。总体而言，基线 PA 水平被确定为三个月后 PA 最重要的预测因子。尽管如此，医生似乎有能力通过深入咨询来提高癌症患者进行 PA 的意愿。