Tips to Increase Stamina:

Sticking to an exercise regimen can help you control your weight, cut your risk of chronic disease and boost your self-esteem and coordination. Whether you already get regular physical activity or are just starting out, you'll need to build stamina to meet fitness goals without risking soreness or injury. Use simple strategies to increase endurance to complete your workout.

Start Slowly
When you start a new exercise program, it's important to gradually increase the duration and intensity of your workout rather than pushing yourself into a full program immediately.  A sports medicine instructor at the Baylor College of Medicine, notes that you should combine walking and running or break up your workout into two shorter sessions each day until you build enough stamina to run the desired distance.

Consume Carbohydrates
A diet rich in carbohydrates can provide your body with starches and sugars that your muscles can use as energy to boost endurance. You should eat foods such as cereal, bread, fruits, vegetables, pasta and milk to obtain carbohydrates, and that you'll increase your fitness performance if more than half of the calories you consume daily feature carbohydrates.

Stay Hydrated
If you keep yourself hydrated while exercising, you'll prevent a reduction in your endurance. Stamina goes down by approximately 25 percent when you lose 1.5 quarts of water and recommends drinking 4 quarts each day to replace liquids lost during exercise. I recommend drinking water before, during and after physical activity. You can also consume a sports drink featuring electrolytes, which contains carbohydrates that can boost stamina.

Curb Bad Habits
Habits that affect your health and physical fitness can negatively affect your stamina. Quitting smoking, for instance, since the habit can impair your lung function and cut your endurance when participating in athletic activities.

Stay Motivated
Inspirational tactics and a positive mental attitude can help you meet physical challenges as you build stamina. Working out with a partner so you can help each other stay motivated and keep up with fitness goals. If you participate in a physical activity outdoors,  finding a way to maintain the workout routine throughout the months with inclement weather since you'll have to rebuild your stamina if you take an extended break from the routine.