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Tai chi has known benefits in improving subjective measures of sleep quality. In a Hong Kong study, researchers quantitatively evaluated tai chi or conventional exercise (i.e., brisk walking plus resistance training) for reducing insomnia in 320 older adults (mean age, 67; 80% women). Participants were randomized to 12 weeks of tai chi, conventional exercise, or usual care (the control group). People who already were active physically, were unable to participate in exercise, or had severe chronic disease were excluded. Intervention groups received three 1-hour training sessions weekly. Sleep parameters were measured by wrist actigraphy, with 7-day measurement periods at baseline, postintervention, and 24 months later.
Sleep quality in the ta…