Emerging research indicates that yoga and aerobic exercise interventions are not significantly beneficial for improving sleep among midlife women who are experiencing hot flashes.
Investigators made this determination after secondary analyses of a randomized controlled trial showed that neither 12 weeks of yoga nor 12 weeks of aerobic exercise had a significant effect on objective measures of sleep duration or sleep quality.
Although the women had no difficulty falling asleep, disturbed sleep was common and remained after each intervention. In particular, women in all groups experienced waking during the night for an average of more than 50 minutes.
The finding is in contrast to an early study that found the yoga and aerobic exercise interventions were associated with small but statistically significant improvements in subjective, self-reported sleep quality and insomnia severity.
“Our primary findings were that the two study interventions had no significant effects on objective sleep outcomes in midlife women with hot flashes
The main implication of this finding is that other behavior treatments with the potential for effectively improving sleep in this population should be examined,” said lead author Diana Taibi Buchanan, Ph.D., R.N., associate professor of Bio-Behavioral Nursing and Health Informatics at the University of Washington in Seattle.
Study results appears in the Journal of Clinical Sleep Medicine.
The authors analyzed data from the Menopause Strategies: Finding Lasting Answers for Symptoms and Health (MsFLASH) network.
The study involved 186 late transition and postmenopausal women with hot flashes who were between 40 and 62 years of age. Study subjects had an average of 7.3 to eight hot flashes per day. Participants were randomized to 12 weeks of yoga, supervised aerobic exercise, or usual activity.
Sleep measures were evaluated using wrist actigraphy, and bedtimes and rise times were determined primarily from the participants’ sleep diaries.
Mean sleep duration at baseline and after each intervention was less than the seven or more hours of nightly sleep that is recommended by the American Academy of Sleep Medicine for optimal health in adults.