Effect of Iyengar yoga practice on fatigue and diurnal salivary cortisol concentration in breast cancer survivors.

Abstract

PURPOSE:

To examine the effect of regular Iyengar yoga practice on measures of self-perceived psychosocial function and diurnal salivary cortisol secretion in stage II-IV breast cancer survivors (n = 18).

DATA SOURCES:

Women were randomly assigned to attend yoga practice for 90 min twice weekly for 8 weeks (n = 9) or to a wait-listed, noninterventional control group (n = 9). Traditional Iyengar yoga routines that progressively increased in difficulty as participants gained strength and flexibility were used. At baseline and after the 8-week study period, women completed self-report instruments to document various aspects of psychosocial and physical functioning, and collected salivary samples for cortisol analysis four times during the day for two consecutive days.

CONCLUSIONS:

The yoga group had lower morning and 5 p.m. salivary cortisol and improved emotional well-being and fatigue scores.

IMPLICATIONS FOR PRACTICE:

Breast cancer survivors are at risk for chronic psychosocial distress that may alter activity of the hypothalamic-pituitary-adrenal axis, resulting in aberrant regulation of cortisol secretion and increased risk of immune dysfunction and cancer progression. Regular yoga practice may be a low-risk, cost-effective way to improve psychosocial functioning, fatigue, and regulation of cortisol secretion in breast cancer survivors. These findings require validation with a larger randomized study.

• Authors: Jacquelyn Banasik, Holly Williams, Mel Haberman, Sally E Blank, Robert Bendel
• Journal: Journal of the American Academy of Nurse Practitioners (J Am Acad Nurse Pract) Vol. 23 Issue 3 Pg. 135-42 (Mar 2011) ISSN: 1745-7599 [Electronic] United States
• PMID: 21355946 (Publication Type: Journal Article, Randomized Controlled Trial, Research Support, Non-U.S. Gov't)
• Copyright: ©2010 The Author(s) Journal compilation ©2010 American Academy of Nurse Practitioners.

Chemical References

• Hydrocortisone

Topics

• Adaptation, Psychological
• Breast Neoplasms (prevention & control, psychology)
• Circadian Rhythm
• Disease Progression
• Early Detection of Cancer
• Emotions
• Exercise Therapy
• Fatigue (prevention & control)
• Female
• Humans
• Hydrocortisone (analysis, biosynthesis)
• Hypothalamo-Hypophyseal System
• Middle Aged
• Pituitary-Adrenal System
• Psychometrics
• Saliva (chemistry)
• Self Report
• Statistics as Topic
• Stress, Psychological (prevention & control)
• Surveys and Questionnaires
• Yoga