There are four periods of time when runners are most vulnerable to injury:

-During the initial 4 to 6 months of running

-Upon returning to running after an injury

-When the quantity of running is increased (distance)

-When the quality of running is increased (speed)

Most running injuries are caused by recurring factors that runners can often prevent or avoid themselves

Training errors are the most common source of injury, particularly lack of adequate stretching; rapid changes in mileage; an increase in hill training; interval training (going from slow speeds over long distances to faster over less ground); and insufficient rest between training sessions.

When selecting a running shoe, the athlete should look for a style that will fit comfortable and that will accommodate his or her particular foot anatomy. When a shoe’s mileage exceeds 500–600 miles, it should be replaced. Runners should keep also in mind potential anatomic abnormalities.

Hip disorders typically manifest themselves as groin pain. Back discomfort that radiates down the leg is cause for referral to a sports medicine specialist.

The patella (kneecap) is a common site of overuse injuries that can benefit from a 20 minute ice massage, a program of stretching and strengthening of the hamstring and quadriceps muscles and a short course of an over-the-counter anti-inflammatory medication. Surgery is rarely indicated.

Ankle laxity can lead to frequent ankle sprains and pain. Beneficial treatment includes muscle strengthening to increase stability, shoe modification to alter gait, and change of a running surface. Foot problems in runners are related to foot types. Nonoperative treatment such as orthotics and shoe modifications should be used if necessary.

The ideal surface on which to run is flat, smooth, resilient, and reasonably soft. Avoid concrete or rough road surfaces. If possible, use community trails that have been developed specifically for jogging and running, so you can measure your records for your exercises calculation and monitoring your heart rate, but you can also use speed and distance devices. Use fine jogging shoes to avoid unnecessary impacts on your feet.  Hills should be avoided at first because of the increased stress placed on the knee and ankle. During warmer, humid weather, increase fluid intake; in cool weather, dress appropriately. It is often helpful to weigh yourself before and after running on a hot, humid day. One pint of water should be consumed for every pound of weight lost. Avoid running during extremely hot and cold temperatures or when the air pollution levels are high. When running at higher altitudes, the runner should gradually acclimate to the lower oxygen levels by slow, steady increases in speed and distance.

Start the planning your daily healthy eating plan, consider where you already. You might want to keep a food diary for one week, one day or more. Writing down everything you eat and drink then compare with what the food pyramid suggests you should be eat, This will offer a better idea of what you need to add to your diet -probably fruits, vegetables and whole grains- and what you could cut back on -for example: fat, meat, salt, -.

Here are some TIPS to get you eating better:

Swap soda with water, Water is calorie-free and makes you feel full, which is important if you're trying to lose weight. Water is also vital if you're exercising more than you used to. Don't think that just switching to diet soda is good enough; getting rid of all carbonated beverages is better for you.

Get whole grains at breakfast. Try oatmeal, toast on whole-grain bread, a whole-wheat English muffin, even leftover brown rice in an omelet. Starting your day with whole grains makes you feel full longer, and we all can use more fiber.

fruit for snacks. Most people don't get anywhere near the recommended number of servings of fruit daily. Get closer by packing whole fruit, natural applesauce or single servings of mixed fruit in light syrup for snacks throughout the day.

Eat more often. Conventional diet wisdom lately is that eating more often during the day prevents blood sugar spikes and makes you feel full, even if you're consuming fewer calories. Go for five or six eating sessions a day rather than the usual three.

Plan ahead. Take time on the weekend to plan your menu—breakfasts, lunches and dinners—and do as much of your shopping and prep work in advance as you can. Being prepared makes it easy to stick to your healthy diet plan.

Try more beans. Americans eat almost 200 pounds of meat, poultry and fish a year, way more than anyone else in the world. Cut your meat intake (and therefore your fat intake) by using beans instead of meat at least one meal a week. Beans are rich in fiber and can help lower cholesterol.

Look for ways to add veggies. It's easy to add vegetables to salads, pasta sauces and rice dishes in addition to just eating them as sides. Each meal, think about ways to add a vegetable, and if you can, do it.
Eating healthy becomes second nature after a while. Once you've lived with your healthy eating plan for a few weeks you won't even miss the unhealthy junk you were eating before.