The purpose of warming up before physical activity is to prepare mentally and physically for your chosen activity.
Warming up increases your heart rate and therefore your blood flow. This enables more oxygen to reach your muscles.
Warming up before you begin any kind of exercise is important to make sure that you’re actively taking steps to reduce your likelihood of an injury and prepping your body for the upcoming stress it’s about to engage in.
In addition, adding a warmup to your routine can help your body ease into the upcoming workout with critical internal systems like your cardiovascular system and muscle groups that will be heavily utilized in compound movements.