If you’re suffering from spider or varicose veins, your doctor probably told you to exercise regularly. Although working out helps you to stay at a healthy weight, which may relieve symptoms caused by swollen veins, some types of physical activity can be your worst enemy. For example, weightlifting impedes blood flow between the legs and heart, causing the blood to pool and damage the veins. Even though varicose veins cannot be permanently cured without medical treatment, regular exercise can prevent the progression of this disturbing condition.