Best practices for warming up before physical exertion include performing dynamic stretches and light aerobic activities to increase blood flow to the muscles. A proper warm-up prepares the body for higher intensity exercise, enhancing joint mobility and flexibility, while reducing the risk of injury. Aim for a 5-10 minute session that gradually elevates heart rate and mimics the upcoming activity. Incorporating mobility exercises specific to the workout increases activation of relevant muscle groups. Adequate warm-up routines ensure optimal performance and smoother transitions into intense exercise.