Stamina refers to the ability to sustain prolonged physical or mental effort. It is a measure of how long you can perform an activity without getting too tired. Stamina depends on:
- Cardiovascular fitness: The heart and lungs supply oxygen and remove waste products from working muscles. Good cardiovascular fitness allows more oxygen delivery for longer periods.
 - Muscular strength and endurance: Strong, endurance-trained muscles can contract for longer before fatiguing.
 - Fuel reserves: Stamina depends on sufficient stores and delivery of fuel like glucose and fat to working muscles.
 - Technique and economy of movement: The more efficient your technique, the less energy expended per movement. Good technique preserves stamina.
 
- Long-distance running - Completing a marathon requires great stamina to keep running for 26 miles. Good cardiovascular fitness, glycogen stores, and mental grit are essential.
 - Manual labor jobs - Workers in physically demanding fields like construction, mining, and farming need the muscular stamina to perform tasks all day.
 - Study and concentration - Students need mental stamina to stay focused during long study sessions or exam preparations.
 
- Getting regular cardiovascular exercise like running, swimming, cycling. This boosts cardiovascular fitness.
 - Resistance training to strengthen muscles and enable them to work harder for longer. Strong legs and core help running stamina.
 - Ensuring good recovery and nutrition - refuel muscles between workouts and get enough sleep.