A “good” swim workout is not one shape. A long aerobic set and a short sprint set can both be excellent — and both can be terrible — depending on whether they match the job they are trying to do. The useful question is not “is this hard?” It is “is this honest about its purpose?”
Below are common workout types you can build in PlanASwim, and what makes each one good in its own way. Mechanics of writing intervals belong in the Building swims guide. This is about judgment.
Endurance workouts
Good endurance work is sustainable and boring on purpose. Distance and time in the water matter more than heroics. Send-offs should leave you able to hold form late, not force you into survival freestyle by the third repeat.
What makes it good: steady aerobic load, clear volume, and a pace you could still describe as swimming — not thrashing — near the end.
Speed and sprint workouts
Speed sets live or die on quality. Short reps, full recoveries, and honest effort beat a long “sprint” ladder that turns into tired middling pace. If the rest is too short, you are not training speed anymore.
What makes it good: few high-quality efforts, enough rest to protect stroke length and power, and a cool-down that lets the nervous system settle.
Technique and drill workouts
Technique days are not filler. They are good when the drills have a point — catch, rotation, kick timing — and when easy swimming after a drill lets you feel the change. Random drill soup with no focus is just busywork.
Browse ideas in the drill library.
What makes it good: one or two cues, drills that match those cues, and enough easy swimming to transfer the feeling into whole stroke.
Race-pace and threshold workouts
These sit in the uncomfortable middle: hard enough to matter, controlled enough to repeat. A good race-pace set has a target (event, stroke, goal pace) and holds you accountable without turning into a time trial you cannot finish cleanly.
What makes it good: a stated pace or feel, repeats you can hit more than once, and rest that protects the quality of the next effort.
Recovery workouts
Recovery swimming is easy to fake and easy to overcook. If you leave the wall more tired than you arrived, it was not recovery. Keep volume moderate, intensity low, and the mood unhurried.
What makes it good: truly easy pace, loose shoulders, and a practice that restores more than it costs.
Mixed and IM-style workouts
Mixed sets earn their place when the transitions teach something — stroke balance, weak-stroke honesty, or race-order practice — not when they exist only to feel complicated. Variety without a theme is noise.
What makes it good: a reason for the mix, fair attention to weaker strokes, and a main set that still has one clear story.
Putting it in PlanASwim
Once you know the type of day you want, write the set clearly — open the builder or start from the interval guide. Distance, send-offs, and difficulty are easier to judge when the workout’s job is already named.