Getting enough quality sleep allows the body to recover, repair and function properly, making it an essential part of overall wellbeing. Dr Jeremy London, a board-certified cardiovascular surgeon, recently shared a video explaining how a lack of sleep can affect the body. He said inadequate sleep can trigger several changes in the body that may affect overall health and physical performance. Muscle building may slow downThe cardiovascular surgeon also said that poor-quality sleep can slow muscle building. People can put significant effort into exercise and healthy eating, but poor-quality sleep may quietly reduce the benefits of those habits.