Most people will sleep fast and deep after exertion, which is a normal phenomenon, but there are a small number of people who are more tired the more they can not sleep, which is related to plant nerve dysfunction, neurasthenia, psychological factors, dietary factors, etc. 1, plant nerve dysfunction: some people will appear after overexertion, plant nerve dysfunction, so that the nerves are in an overexcited state, resulting in insomnia; 2. neurasthenia: is a common neurological disorder, long-term overwork is easy to induce neurasthenia, the emergence of mental excitement, brain fatigue, sleep disorders and other symptoms; 3, psychological factors: if their own psychological stress is relatively large, thinking too much, will also make the nerves excited, affecting sleep; 4, dietary factors: some people at work to relieve sleepiness, may increase the intake of coffee, strong tea, which contains excitatory Nerve caffeine, theophylline, etc., if not fully metabolized before going to bed at night, will also affect sleep. In addition, the sleep environment will also affect the quality of sleep, if the sleep environment is noisy, can also lead to insomnia, usually pay attention to the combination of work and rest in life, avoid overwork, develop the habit of regular rest and rest, but also pay attention to keep the mood happy, when there is pressure can find someone to talk to or do something else to relieve pressure, such as exercise, listening to music, etc..