Body mass index among elderly population and its association with neurological and musculoskeletal diseases in Aseer, Saudi Arabia.

Introduction: An increase in BMI in the elderly may reduce life expectancy and increase the risk of death, cardiovascular disease, and metabolic syndrome. Frailty index, body weight, and pain levels all seem to be linked. Excessively low or high body weight may cause muscle weakness and decrease physical activity, placing the elderly at risk for frailty.