Randomized, Controlled Trial of Yoga in Women With Breast Cancer Undergoing Radiotherapy

J Clin Oncol. 2014 Apr 1;32(10):1058-65. doi: 10.1200/JCO.2012.48.2752. Epub 2014 Mar 3.

Abstract

Purpose: Previous research incorporating yoga (YG) into radiotherapy (XRT) for women with breast cancer finds improved quality of life (QOL). However, shortcomings in this research limit the findings.

Patients and methods: Patients with stages 0 to III breast cancer were recruited before starting XRT and were randomly assigned to YG (n = 53) or stretching (ST; n = 56) three times a week for 6 weeks during XRT or waitlist (WL; n = 54) control. Self-report measures of QOL (Medical Outcomes Study 36-item short-form survey; primary outcomes), fatigue, depression, and sleep quality, and five saliva samples per day for 3 consecutive days were collected at baseline, end of treatment, and 1, 3, and 6 months later.

Results: The YG group had significantly greater increases in physical component scale scores compared with the WL group at 1 and 3 months after XRT (P = .01 and P = .01). At 1, 3, and 6 months, the YG group had greater increases in physical functioning compared with both ST and WL groups (P < .05), with ST and WL differences at only 3 months (P < .02). The group differences were similar for general health reports. By the end of XRT, the YG and ST groups also had a reduction in fatigue (P < .05). There were no group differences for mental health and sleep quality. Cortisol slope was steepest for the YG group compared with the ST and WL groups at the end (P = .023 and P = .008) and 1 month after XRT (P = .05 and P = .04).

Conclusion: YG improved QOL and physiological changes associated with XRT beyond the benefits of simple ST exercises, and these benefits appear to have long-term durability.

Publication types

  • Randomized Controlled Trial
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Breast Neoplasms / metabolism
  • Breast Neoplasms / psychology*
  • Breast Neoplasms / radiotherapy*
  • Depression / prevention & control
  • Dyssomnias / prevention & control
  • Fatigue / prevention & control
  • Female
  • Humans
  • Hydrocortisone / metabolism
  • Middle Aged
  • Muscle Stretching Exercises
  • Quality of Life* / psychology
  • Saliva / metabolism
  • Yoga*

Substances

  • Hydrocortisone