A sound sleep at night ensures a healthy body and a healthy mind. However, according to a study published in the Science Direct Journal, getting less than eight hours of sleep is associated with repetitive negative thoughts like those seen in anxiety or depression. The researchers explained that people have some tendencies to have thoughts that get stuck in their heads and their elevated negative thinking makes it difficult for them to disengage with the negative stimuli. While other people may be able to receive negative information and move on, the participants had trouble ignoring it. The team of researchers examined the timing and duration of sleep in individuals with moderate to high levels of repetitive negative thoughts.