Answer:
Increased Risk Of Injury:
Over 30% of injuries seen by sports medicine clinics are skeletal muscle injuries — which can be easily prevented by warming up and stretching.
Blood Pooling:
If you stop exercising abruptly without cooling down, your muscles will suddenly stop contracting vigorously. This can cause blood to pool in the lower extremities of your body, leaving your blood without as much pressure to be pumped back to the heart and brain. As a result, you may dizzy and lightheaded, and you may even faint.
Increased Stress On Cardiovascular System:
Warming up helps you to gradually increase your heart rate and breathing to a level that will be able to meet the demands of your workout. If you start exercising at a strenuous level without warming up first, you will place unnecessary stress on your heart and lungs.