As experts have long known, regular physical activity delivers profound benefits to the body. One key area backed by research is its impact on sleep quality—a game-changer for those struggling with insomnia. If you're not yet active, this could be your motivation to start. During exercise, the body produces cortisol, the stress hormone that, at optimal levels, promotes deep, restorative sleep. Low cortisol, however, often leads to sleep disorders. Studies suggest physical exertion not only elevates cortisol but also extends total sleep time and deep sleep phases after high energy expenditure.
Dr. Verena Senn, a renowned neurobiologist and sleep specialist, explains: "Current research shows that physical activity helps maintain balance between the sympathetic and parasympathetic nervous systems. This balance governs whether we're tense or relaxed, influencing digestion, blood pressure, heartbeat, breathing, body temperature, and emotional states. Alongside our internal clock regulating the wake-sleep cycle, this interplay is essential for falling asleep easily and enjoying high-quality rest. Regular exercise is key to nurturing both your health and sleep."
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