Pneumonia is an infection in your lungs and is usually caused by either a bacteria, fungus or a virus. Some types of pneumonia come from inhaling a liquid or chemical. Pneumonia can be serious if its not treated quickly, especially for those who have compromised immune systems, the very young or the very old.

Walking on a treadmill will do everything but make your legs bulky. This type of exercise is an effective way to challenge your cardiovascular system, improve your health, strengthen your lower body and possibly even reduce your levels of body fat.

Hiking allows you to exercise and explore the great outdoors at the same time. It's a suitable getting-to-know-you activity for a first date or a chance to have a deep conversation with an old friend. However, a hike could leave your muscles achy and your joints swollen.

Shin splints are a common injury that can happen with any activity including running, playing sports, walking, dancing and taking aerobics classes. Shin splints that are not properly treated can turn into a more serious condition or they can become chronic.

The diagnosis of a partial or full meniscus tear limits your physical activity.

It’s common to experience some swelling of your hands, feet and lower legs, symptoms known as edema, during and immediately after exercise. This is especially true during hot weather, during pregnancy and after eating salty foods, which increases water retention.

Whether you've recently recovered from an injury or it's been a while since you've exercised, morning walking is a low-impact activity that helps you burn calories and build muscle, particularly if you pair it with a diet of nutritious foods in moderation.

Successful weight loss is usually the result of a decrease in the amount you eat and an increase in the amount you exercise.

The Centers for Disease Control and Prevention recommend that healthy adults get at least 30 minutes of physical activity on a daily basis. Unfortunately, when you have trouble getting those 30 minutes every day, the recommendation often feels more like an insurmountable task.

Build a better butt on the beaten track with long strides, heel-to-toe walking and lunges. When you add gradual changes to your regular walking routine, such as increasing the incline of the treadmill and throwing in a few tush-targeting moves, you can build the gluteal muscles as you get fit all over.

If you are going to lose weight, you need to either burn more calories, consume fewer calories, or a combination of both. Both walking and climbing stairs are forms of aerobic exercise that are effective at burning calories.

Ideally, walking on a treadmill should make you feel invigorated or maybe a bit tired, but feeling weak and dizzy is a sign something is wrong. Over-exerting on a treadmill by walking faster than you're able to, at too much of an incline or for too long can cause weakness and dizziness.