Can anybody explain me ... How to increase my STAMINA????

Use multivitamin and do exercise,the most important is exercise. Do it regular, you can get the result after 1 month or less. try it, hope it work because it work for me

the best way is to do some exercise. it depends what exercise you do. a few ideas on increasing stamina is to do exercises in the sport you do or in the gym and work on a specific exercise building up in time, speed and length of doing the exercise. for example if you go to the gym you could use a jogging machine. start for 10 mins a day or 3 times a week. after the first week incease to 12 and then 15. by the third week you should be doing 15mins and then increae to 20. every time you go jogging in the gym or outdoors also practise different running speeds and different inclines (for the gym or going up hills if youre outside) so practice a route on the jogging machine. spend 5 minutes going up a hill and also 5 minutes at a faster speed. then increase the time level and difficulty. you could try the same with swimming practice swimming as many lengths as you can say 10 to begin or swim in open water for 10 mins to begin then increase the lengths and time using different strokes