Before judging whether you are a low-energy person, check if you have airway stenosis, thoracic compression, tonsil swelling, scoliosis, rhinitis, sinusitis, pharyngitis—these series of conditions that are neither too big nor too small can affect your breathing, leading to long-term mild hypoxia and lower energy levels. Additionally, factors such as mental stress, neurological issues, sleep environment, and a series of other elements that affect sleep quality may cause you to lie down for 10 hours but only sleep for 6 hours or even less.