Poor Sleep Linked to Risks Beyond Fatigue

Poor sleep is more than daytime fatigue: recurring disruption can affect cardiovascular health, metabolism, immune function, pain sensitivity and brain performance. Sleep apnea may repeatedly interrupt breathing and lower oxygen levels, prompting awakenings and increases in heart rate or blood pressure; research has linked greater overnight oxygen drops with higher later cardiovascular risk, though it does not prove cause and effect. Sleep deprivation can impair judgment and reflexes, make driving dangerous, weaken infection defenses and heighten pain sensitivity, while prolonged sleep loss may contribute to serious health problems. A fall clock change offers an opportunity for extra sleep but does not guarantee better-quality rest, because the body’s circadian rhythm does not adjust to the clock; the transition is generally easier than the spring change that removes an hour, and an expert says permanent standard time may be healthier, particularly for young people.