I found this excerpt online...to learn more click on the link at the end

Stamina
Increasing your stamina will help you complete your every day tasks more easily, and ensure that you have raised energy levels and feel fitter. There is also more information in the Cardio section. Use the link below to find our more information about exercise to improve your stamina. There are some great exercises, suitable for all.
Stamina

Abdominal Exercises

The stomach is one areas of the body where excess weight is most noticeable - especially in men. Use the exercises in this section to strengthen the abdominal muscles and to really tone that stomach!

Stomach Tuck-In
Waist Twists
Sit Ups and Crunches

Take a look at Abdominal Exercise in more detail in the Abdominal Exercise page. Also check out the Abdominal Exercise Machine page.

Upper Body Exercises
Helpful exercises for those who would like to improve their upper body strength and tone. Some of the exercises require weights, and also a weight bench would be of use, but for those exercises like the bicep curls why not consider using a bag of sugar, or maybe some tinned produce to give that extra workout. Have a look at the resistance straps and free weights if you would like some information on additional exercise equipment to help you out while doing these exercises.

http://www.hintsandthings.co.uk/bathroom...

This is another excerpt. Learn more by clicking on this link at the end

50 Tips to Increase Stamina
Can there really be 50 ways to increase performance in your favorite sport? Twenty-five push-ups a day do not an athelete make, but combine those exercises you do for strength and endurance with a nutritious diet, aerobic conditioning, weight training, and a healthy lifestyle, and you can be at the top of your form--whatever your sport. Consider the suggestions below; you may be in for a few surprises.

1. Every athlete should have a baseline medical screen from which to work. Overtraining, illness, and stress can all affect performance. Fatigue sets in, and injuries may result. If you are over 40 and beginning an exercise program, make sure you get that physical.

2. Frequency, intensity, and time/duration are the components of a safe, effective exercise program. Mess up any of these, and you risk injury. Experts agree on a few basics: three or more workouts a week, at a heart rate not exceeding 60 to 80 percent of your maximum heart rate, for 20 minutes or longer. Even moderate exercise works to increase stamina.

3. Don't accelerate your training level too rapidly. You need time to build confidence and accustom your muscles to any new activity. A beginner might benefit initially from working with a trainer to find the optimum level of activity. If you run, follow the 10 percent rule: do not increase mileage by more than 10 percent per week.

http://findarticles.com/p/articles/mi_m0...

In the first paragraph, you stated "I will be tired in 4/5 minutes!(and so will just go in nets)."

4/5 minutes is 0.8 minutes you know :P
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Anyway, back to your question:
Eat whole grain carbs an hour before workouts or take a caffeinated product before workouts.

Or use a prework out supplement to boost stamina.

http://answers.yahoo.com/question/index?...
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Also, remember:
Don't exercise after meals:
Don't walk about - People always say that after a meal walk a hundred steps and you will live till 99. In actual fact this is not true. Walking will cause the digestive system to be unable to absorb the nutrition from the food we intake.
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Some guidelines would be:
1 - Some of the sports drinks are gimmicks though others do contain essential electrolytes that are lost through sweat. Always read the ingredients.
2 - Eat plenty of protein after your workout. Protein assists in the bodys fittening & repair process that occurs during the 72 hours after your workout. Your muscles will then repair fitter and stronger.
3 - Listen to your own body. Its not always a case of eating more its usually more about altering the ratio of protein and carbohydrate and the times you eat them. Eat a carbohydrate based meal about 90 minutes before your work out for energy and protein afterwards for repair. Egg whites are the purest protein form going.
4 - Try to leave 72 hours apart from your weight workouts and do the cardio workouts inbetween. Do not do both workouts in one session as you will just end up with burn out.
Hope this helps. Do not give up, keep your routines varied. I have been an avid gym goer for 8 years now and the benifits it has provided for me are priceless. You just need to find your plateu that you can work and progress on. Everyone is different.

http://answers.yahoo.com/question/index;...
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Cheers :D

I just saw your message and so I came back to the question to reply...

Cardiovascular exercise is basically any exercise that makes your heart beat faster. When you are doing a cardiovascular workout you want to make sure that you slowly bring you heart rate up and maintain it until you are finished (usually 30 minutes to an hour). You don't want to take breaks or stop at any point during the exercise.

In actuality, anything that makes your heart rate increase can be a cardiovascular workout. Something as simple as mowing the lawn is a good example because you are moving continuously for a long period of time. It may not be the best cardiovascular workout because it's too hard on the lower back and not difficult enough for the heart. The trick to finding a good workout is to find something that is easy enough that you can do it for 30 minutes, but hard enough to raise your heart rate and make you sweat profusely.

Running is a good option because it is difficult one. You can run in the street but it is better for your knees if you run on a soft surface like on a machine. Rowing is a good one too but it can he hard to get into a steady rhythm. If you have bad stamina, start with a bicycle in the gym, set the difficulty to low, grab a magazine and just pedal casually for at least 30 minutes. If it seems too easy, just pedal a little faster.

You should also be listening to your body because it will give you feedback. If you feel tired, burning muscles, breathing hard, sweating a lot... KEEP GOING, that's part of the exercise. There are some signs that you have to be careful with though: if you start to feel any intense pain in your muscles or chest you should stop. You should also stop if you start to feel noticeably dizzy.

I saw the other posts, one of them focuses too much on diet. Your diet will help you have more energy but it's not that much of a factor in your stamina as exercise. The other one was just cut and pasted from a website and is loaded with a broad range of health tips but doesn't really focus on stamina.

Bottom line is that practice makes perfect. If you want to be able to last a long time on the field, you have to be able to last a long time in the gym.

you need to improve your breathing skills - yoga is great for that. Do question why you run out of breath so quickly - asthma in the family? smoker?
Reduce activities that impede your quest for physical health and well being, increase activities that facilitate health -walking, cardio excercise (in addition to football training - -not weightlifting) loving, house cleaning, yoga.....
best of luck.

i am a health nut. for me i have discovered that state of mind can play a large roll in any type of fitness goals. being relaxed, well stretched, and confident can increase level of fitness one is trying to reach. cycling is very good as it is your cardio endurance you are trying to beef up. the tread mill and eliptical are all very good things for that. my favorite is yoga. why you ask? it is because it is more than just flexibility training but also breathing excersises. those will help to control your respitory and cardio activity in any strain of activity. it will allow you to breath appropriately to the excersise you are doing to avoid tiring and cramping. a good few months of that and you'll definitely notice a difference.

When ever you feel tired just start long breathing exercise and the more oxygen you will inhale the more energised you will feel instatntly and this is tested stuf when I used to be boxing ring.

You need to do skipping and start with slow and then increase the numbers on daily basis like from 50-75-100-125 and so on. I am sure the day you can do 500 skipping a day you will have great stamina to climb any hill and do any strainous work.

Good Luck.

let me answer this question,, i play football since i was lil kid. anyway let me tell you, from my experience exercises and going to the gym for running didn't help in increasing my stamina ,, the benefit of these exercises is only to build your muscles. so if they are weak, if your legs feels tired in a short then this is a difftent matter than stamina, you need to strengthen your body muscels and this needs a speical scheduel not only random exercises you choose.
but if your muscles are fine and your problem is with your breath and your heart beats, then let me tell you this... "whenever you play football, the minute you feel tired, you MUST countinue in playing, you MUST NOT quit the game"... just take a 30 seconds brake, then continue playing, until you finish the whole match. the important thing is you must countinue playing and running and keep your mind in the game. i hope that i was be of any help :)