Risk assessors and health and safety personnel in New Jersey will likely know that the insurance firm Liberty Mutual releases a report every year ranking the most common causes of nonfatal workplace injuries. The latest Workplace Safety Index was released on Jan. 14, and it revealed that injuries related to overexertion were the leading cause of workers' compensation claims in 2013. This finding will come as no surprise to safety advocates who are already familiar with a November 2015 Bureau of Labor Statistics report revealing that musculoskeletal disorders accounted for almost a third of all illness and injury cases among American workers in 2014.