Abstract P2-12-07: The association between exercise behavior and patient-reported outcomes in women with early breast cancer receiving locoregional radiation therapy
Authors: Arya Ritu , Jones Lee W , Blitzblau Rachel C , Palta Manisha , Massa Lisa , Broadwater Gloria , Horton Janet K 
Published: May 2015

Purpose/Objectives: RT is associated with acute treatment-related complications that can lead to poor quality of life (QOL) and fatigue. Exercise has been shown in other cancer treatment settings to improve negative outcomes. We conducted a prospective pilot study to explore the association between exercise, patient-reported outcomes (PROs), and radiation therapy (RT) toxicities.

Materials/Methods: Patients with surgically excised ductal carcinoma in situ or invasive breast carcinoma receiving curative radiation were enrolled. Each patient completed an exercise behavior/QOL survey at two time points: before the patient’s 5th fraction of radiation and during the last week of treatment. Limb girth measurements to evaluate lymphedema and assessment of shoulder range of motion (ROM) were completed on all patients at the same two time points. Skin toxicity was assessed weekly throughout radiotherapy. Exercise behavior was quantified with the Godin Leisure Time Exercise Questionnaire (metabolic equivalent [MET] hours per week). Patients with &gt;7 METs/week were designated the exercise cohort (n=10) and those with &lt;7METs/week the non-exercise cohort (n=10). PROs were measured using standardized questionnaires. Continuous variables were compared using the Wilcoxon rank sum test and percentages were compared using Fisher’s exact test.

Results: Median patient age was 56 (range 28-70) years. Median MET in the exercise cohort was 12.9/week (range 7.5-35.0, n=10); 0.0/week in the non-exercise cohort (range 0-5.8, n=10). Women in the exercise cohort experienced significant improvement in depression scores over the course of treatment as compared to those who did not exercise (p=0.013). Those in the exercise cohort also reported less fatigue on the FACT-Fatigue subscale at treatment completion (exercise: 133.0; non-exercise: 121.0) (p=0.6). In addition, only 30% of exercisers suffered from grade 2 dermatitis compared to 70% of non-exercisers (p=0.2), despite a similar body mass index (26.4 exercise cohort versus 28.1 non-exercise). Exercisers also had greater ROM in the affected (91.7 vs. 85.2%, p=0.1) and contralateral shoulder (95 vs. 90%, p=0.048) at treatment completion. No differences in pain or sleep scores were noted and lymphedema was mild (&lt;3cm) in the entire patient cohort.

Conclusion: The vast majority of current exercise oncology literature indicates that physical activity is an independent predictor of quality of life metrics in cancer patients. Our study notes a trend towards improved outcomes with increased exercise during radiation therapy, suggesting that accrual of additional patients to our pilot study is worthwhile. Ultimately, a concurrent exercise intervention may improve quality of life and reduce acute toxicity in patients undergoing breast radiation treatment.

Citation Format: Ritu Arya, Lee W Jones, Rachel C Blitzblau, Manisha Palta, Lisa Massa, Gloria Broadwater, Janet K Horton. The association between exercise behavior and patient-reported outcomes in women with early breast cancer receiving locoregional radiation therapy [abstract]. In: Proceedings of the Thirty-Seventh Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2014 Dec 9-13; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2015;75(9 Suppl):Abstract nr P2-12-07.