Hi Sudem,
I only know of one product that you can take to increase your physical stamina in 3 to 4 days and that is The Oxygen Therapy Program . It is 100% natural and there are no harmful side effects. Plus because it all dissolves into oxygen and water, you will never be tagged on any tests for illicit drugs.
I have been on this therapy for the past year and like myself, everyone who begins their program, experiences more energy after only 3 days - and you will too.
Good luck.