Why More Sleep Doesn't Mean More Energy

For many, achieving the recommended seven to nine hours of sleep nightly does not eliminate morning fatigue. Experts now highlight that the restorative capacity of sleep, rather than its length, is key to feeling refreshed. Persistent tiredness often signals disruptions to sleep quality that may go unnoticed.

Various factors can compromise restorative sleep. Undiagnosed sleep disorders like sleep apnea, restless legs syndrome, or periodic limb movement disorder can fragment sleep architecture. Systemic health issues such as hormonal imbalances, thyroid disease, anemia, chronic infections, and metabolic conditions are also implicated in unexplained fatigue.

Mental health significantly influences sleep quality. Anxiety, depression, and chronic stress can prevent the brain from achieving deep, restorative sleep stages. This leads to light, non-restorative sleep, even when total sleep duration is adequate. Environmental factors and poor sleep hygiene can further diminish sleep quality.