Members subscribed to the ELITE or the Training Pack get access to Dynamic Intervals.

What Are Dynamic Intervals? 

Dynamic Intervals use your best times for each stroke to intelligently adjust the intervals on each set to you.

How To Personalize Your Dynamic Intervals | iPhone

To use Dynamic Intervals, Navigate to the Profile page, tap on Settings, then in Workout Settings and tap on Dynamic Interval Times. Input your best time for each stroke and distance. (It's ok to guess if you're not sure. Even vague guesses at your best time will help us shape the intervals to you.)

After you've inputted your times, all MySwimPro workouts (WOD, Training Plans, and Workout Library) will
be adjusted using Dynamic Intervals Feature.

How To Personalize Your Dynamic Intervals | Android

To use Dynamic Intervals, Navigate to the Profile page, tap on Settings, then in Personal tap on Dynamic Intervals. Input your best time for each stroke and distance. (It's ok to guess if you're not sure. Even vague guesses at your best time will help us shape the intervals to you.)

After you've inputted your times, all MySwimPro workouts (WOD, Training Plans, and Workout Library) will
be adjusted using Dynamic Intervals Feature.

Need support? Our Community Champion would love to help! Contact us at support@myswimpro.com