It's no secret that insomnia or lack of sleep can have serious consequences, including poor concentration and short-term memory loss. But studies show that blacks may be disproportionately affected by these health risks and prone to long-term effects of poor sleeping habits. Several studies have found that African Americans sleep fewer hours, experience more frequent interruptions in their sleep, and are more likely to take medications for sleep, The St. Louis American reports. According to a 2010 National Sleep Foundation study, blacks reported the least amount of sleep and the busiest bedtime routines. The study found that 17 percent of African Americans are more likely than whites (9 percent) and Hispanics (13 percent) to do job-related work in the hour before bed. Additionally, blacks reported losing sleep every night over financial and employment concerns at a higher rate than whites. However, blacks said they need less sleep in comparison to whites, Hispanics and Asians to perform at their best during the day.