With the sputtering economy stressing us all out, there are plenty of things for us to lose sleep over. However, a recent study conducted by the National Sleep Foundation might suggest that we're adapting to these taxing times. According to the National Sleep Foundation's 2010 Sleep in America Poll, African Americans sleep less than Hispanics, whites and Asians, but reported that they required less sleep to perform at their peaks. So what's keeping us going? Despite sleeping less, we're more likely than other groups to engage in sex and prayer--both of which are linked to better sleep. Read More: Frisky Friday: Too Tired For Sex?Frisky Friday: Sex in the Morning, Noon or Night?