While running on the treadmill every single day seems like serious exercise it may not give you the results you are looking for. For this reason, you should try cross training - using two or more types of exercise in one workout or in alternate workouts.

Cross training not only eliminates boredom in your head, it also eliminates boredom in your muscles. Here is a basic rundown on the benefits of various types of exercise for the next time you're looking to add in a little variety:

• Swimming improves cardiovascular conditioning, muscle strength, endurance, posture and flexibility. Swimming works shoulder and leg muscles, and it takes the pressure off your joints.
• Biking gives the legs a workout, while putting a low level of stress on the joints. A recumbent bike will work the glutes, while an upright bike focuses on the quads.
• Jogging or running, one of the top calorie-burning exercises, is great for your leg muscles. To prevent injury, however, those who are out of condition should begin with walking, and work up to intervals of walking and jogging.
• Elliptical machines provide variety with a number of programs and take pressure off the joints. Different settings, such as resistance and incline, give you a more strenuous workout.
• Stair-climbers provide an intense cardiovascular workout, and are weight-bearing, making them beneficial for weight loss.
• Aerobics add fun to a workout, and at the same time burn a lot of calories. The variety of movement boosts coordination as well.
• Pilates and yoga enhance flexibility and strengthen the core muscles in the abdomen and back.