Swim for a long time, often. Train, push, and work at it.
long distance jogging, cycle, swimming
As well as great exercise,you can build stamina and endurance for both long and short events
Your swimming endurance may be poor due to lack of consistent training, improper technique, or inadequate cardiovascular fitness. To improve it, focus on regular swim workouts, proper breathing techniques, and incorporating interval training to build stamina and endurance. Additionally, maintaining a balanced diet and staying hydrated can also help enhance your swimming performance.
Swimming.
One of the best ways to build endurance is to run on the beach. A lot of marathon runners prepare by running on the beach in the sand. It will help you build endurance.
Endurance - NikkiJ.
swimming & shooting
Running, jogging and swimming are all good for building endurance. You just keep at it on a regular basis, ideally two or three sessions a week, and try and go a little further each time.
Incorporating fitness swimming into your workout routine can improve cardiovascular health, build muscle strength, increase flexibility, and help with weight management. Swimming is a low-impact exercise that can reduce stress on joints and improve overall endurance.
practice
It helps build up physical endurance and strength
probably swimming