Obesity, diabetes, and exercise associated with sleep-related complaints in the American populationMichael A. Grandner; Nirav P. Patel; Michael L. Perlis; Philip R. Gehrman; Dawei Xie; Daohang Sha; Wilfred R. Pigeon; Karen Teff; Terri Weaver; Nalaka S. Gooneratne · 2011