At what age does sleep efficiency decrease? Understanding the decline with age
Research has consistently shown that sleep efficiency, which measures the time spent asleep versus the time in bed, decreases as people get older. While the most significant decline often begins after age 40, leading to a stable but lower efficiency period through midlife, the reduction continues steadily into advanced old age. This age-related change is a natural part of the aging process, but understanding its causes can help mitigate its impact on health and well-being.