CSS Workout

Find your Critical Swim Speed with our printable workout

Test your CSS

Take our CSS workout to the pool, fill it in, then head to our calculator page to find your Critical Swim Speed

This workout can be easily extended - simply integrate into another workout.

Take time to regularly check your CSS to monitor your progress, we recommend checking every month.

Many factors can alter your CSS from day to day, these include: hydration, hunger level, fatigue, etc.


Try to keep these factors as consistent as possible between CSS tests to gain an accurate picture