Poor stamina can have various causes, ranging in severity from 'troubling' to 'very serious'. Finding the true cause means ruling out or confirming each possibility – in other words, diagnosis.
Diagnosis is usually a complex process due to the sheer number of possible causes and related symptoms. In order to diagnose poor stamina, we could:
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How would you rate your physical stamina (ability to undertake prolonged exercise)?
Possible responses:→ I have poor endurance
→ I'm about average / don't know
→ I have strong endurance
Sodium phosphate or potassium phosphate is often used by endurance athletes in order to increase aerobic capacity and athletic performance. Phosphates reduce the effects of lactic acid build-up in the muscles; they help make oxygen delivery to the muscles more efficient; they are used in the production of Adenosine Triphosphate (the chemical form of energy within cells) and Creatine Phosphate (an immediate energy store) and therefore are believed to increase the chemical energy stored within cells.