This set was adapted from SwimSmooth.com‘s Ramp Test
The Sweet Spot Test Set
Using a Tempo Trainer
12 x 50 LCM @ 1:20
Begin at a tempo you know you can hold (if you are doing freestyle, try something between 1.50 and 1.80). Hold that tempo as precisely as possible for the entire 50m. Have a friend or a coach count your cycles and record that info using this worksheet. On each subsequent 50, lower your tempo by .10 until you reach a tempo that you are unable to hold. After that failure point, take your tempo back up to near where it started, and bring it down again. Also make note of your effort level on a scale of 1-10.
At the completion of the set, you should have a range of tempos, cycle counts, efforts, and times. Look for effort levels in the 8 or 9 range. If you are in shape, these should roughly approximate 200 pace. The range of data that you find will be your “Sweet Spot.” Train in and around this sweet spot as often as possible to improve your ability to sustain this pace or even to improve upon it.