Stamina is the ability to keep going, whether that means running farther, climbing stairs without getting winded or finishing a match strong. It improves in almost everyone who trains consistently, at any age.
Build an aerobic base
Most endurance comes from your aerobic system, which improves with steady, relatively easy exercise: brisk walking, jogging, cycling, swimming or rowing. Easy means you can talk in full sentences. Many endurance coaches recommend that most of your training, often around 80%, be done at this easy intensity, with a smaller share of hard sessions.
Start with 20 to 30 minutes, three times a week, and gradually build up. The World Health Organization recommends 150 to 300 minutes of moderate activity a week for adults.
Add intervals
Once you have a base, add one or two sessions of intervals per week: short periods of hard effort followed by easy recovery. Examples:
- 6 to 10 repetitions of 1 minute fast, 1 to 2 minutes easy;
- 4 repetitions of 4 minutes at a hard but sustainable pace, with 3 minutes easy between.
Intervals raise the ceiling of what your heart and muscles can do.
Progress gradually
Increase total training time or distance little by little, and take an easier week every three or four weeks. Sudden jumps in volume are a common cause of injury and burnout.
Strength training
Two short strength sessions a week (squats, lunges, push-ups, rows, core exercises) make muscles more efficient and resistant to fatigue, and reduce injury risk.
Recovery and fuel
- Sleep 7 to 9 hours; adaptations happen during rest.
- Eat enough carbohydrates to fuel training, plus protein for repair.
- Drink regularly through the day and during longer sessions, especially in heat.
Measure progress
Track a simple test every few weeks: the time to run or walk a set distance, the distance covered in 12 minutes, or how your heart rate responds to a set pace. A lower resting heart rate over time is another sign of improved fitness.
If you have a heart condition, other chronic illness or have been inactive for a long time, talk to a doctor before starting vigorous training. Stamina is the foundation of sports like cross country running.
