This pilot study evaluated the impact of Bikram Yoga on subjective and objective sleep parameters.We compared subjective (diary)\nand objective (headband sleep monitor) sleep measures on yoga versus nonyoga days during a 14-day period. Subjects (n = 13)\nwere not constrained regarding yoga-practice days, other exercise, caffeine, alcohol, or naps. These activities did not segregate by\nchoice of yoga days. Standard sleep metrics were unaffected by yoga, including sleep latency, total sleep time, and percentage of time\nspent in rapid eye movement (REM), light non-REM, deep non-REM, or wake after sleep onset (WASO). Consistent with prior\nwork, transition probability analysis was a more sensitive index of sleep architecture changes than standard metrics. Specifically,\nBikram Yoga was associated with significantly faster return to sleep after nocturnal awakenings. We conclude that objective home\nsleep monitoring is feasible in a low-constraint, real-world study design. Further studies on patients with insomnia will determine\nwhether the results generalize or not.
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