If you feel tired or sore, ease up somewhat on the level of exercise, or take a day off to rest. Talk with your doctor if you have questions or think you have injured yourself seriously. Most kinds of exercise will help both your heart and your other muscles. Resistance training is exercise that develops the strength and endurance of large muscle groups. Weight lifting is an example of this type of exercise.
Exercise machines can also provide resistance training.
Your doctor or a trainer at a gym can give you more information about exercising safely with weights or machines. Calf Stretch Face a wall, standing about 2 feet away from it. Keeping your heels flat and your back straight, lean forward slowly and press your hands and forehead to the wall. Hold the stretch for 20 seconds and then relax. Quad Stretch Face a wall, standing about 1 foot away from it.