Vary the strokes
Variety is the enemy of calories!
It is of course obvious that the duration and intensity of your session will determine the calories burned. However, diversifying your sessions by changing the stroke, exercise and pace is not very complicated, and contributes tremendously to caloric expenditure.
First, it is important not to accustom your body to the effort or it will lose fewer calories than before. Habits can be formed quickly and things can soon become increasingly easy.
Moreover, changing the stroke allows you to work all parts of your body uniformly. By alternating three or four strokes during the same workout, you allow all your muscle groups to work efficiently and thus scorch all the more calories.
For information, strokes, which require a intense full body effort and which thus consume a maximum of calories, are the racing breaststroke and the coveted butterfly.
Swimming offers you four strokes that you can easily multiply with a very large number of exercises with or without training equipment. Imagine the scope of possibilities!