Sleep deficiency impacts cardiovascular and metabolic health

Ongoing sleep deficiency carries significant risks for long-term health, affecting the heart, metabolism, muscles, and brain. While daytime fatigue is the most immediate symptom, sleep is an active biological process essential for regulating circulation, metabolism, and immune function.

Research indicates that insufficient sleep and frequent nighttime waking are associated with higher risks of hypertension and coronary heart disease. During non-REM sleep, blood pressure and heart rate typically fall; however, sleep disruptions can prevent this necessary reduction in workload for the heart.

Conditions such as obstructive sleep apnea can exacerbate these risks. Repeated airway blockages interrupt breathing and lower oxygen levels, triggering awakenings that raise blood pressure or pulse. A 2023 study involving over 4,500 middle-aged and older adults linked significant overnight oxygen reductions to higher subsequent cardiovascular risk.