Copyright © 2026 OyList. All Rights Reserved.
Share
Items16
1
Critical Swim Speed (CSS) Test Session
About 1,800 m, 40 to 50 minutes. The session that gives every other pace on this list a number.
Warm-up: 400 easy, then 4 x 50 building to fast, 15 s rest.
Main: 400 as fast as you can hold. Swim 200 very easy, then 200 flat out.
Cool-down: 400 easy, any stroke.
Subtract the 200 time from the 400 time and halve it: that is your CSS pace per 100. A 7:00 400 and a 3:20 200 give 1:50. The 200 has to be a true all-out effort, or the gap shrinks and the pace comes out too fast. Repeat every six to eight weeks to see progress.
2
CSS Threshold 100s
About 1,700 m, 40 to 45 minutes. The bread-and-butter fitness set once you know your CSS pace.
Warm-up: 300 easy, then 4 x 50 build, 15 s rest.
Main: 10 x 100 at CSS pace with 10 to 15 s rest.
Cool-down: 200 easy.
The pace should feel steady and uncomfortable rather than desperate, and the last 100 should match the first. If you fade by more than three seconds, lengthen the rest rather than slowing down. Scale it by repeats: 6 x 100 makes a 1,300 m morning, 15 x 100 a 2,200 m one. Holding the same pace on 10 s rest instead of 15 s is the clearest sign you are getting fitter.
3
T-30 Benchmark Swim
45 to 50 minutes, distance varies. A pacing test that needs no math beyond one division, and a simpler alternative to the CSS test.
Warm-up: 400 easy, then 4 x 25 brisk.
Main: swim continuously for 30 minutes at the fastest even pace you can hold. Count lengths or let a watch do it.
Cool-down: 200 easy.
Divide 30 minutes by the distance in hundreds to get a threshold pace for repeats: 1,800 m works out at 1:40 per 100. The trap is going out too fast, so aim for even splits or a slightly quicker second half. Swimmers who dread a flat-out 400 often find this one easier to judge.
4
Up-and-Down Pyramid
About 1,300 m, 30 to 40 minutes. The best first structured session for someone used to swimming straight lengths, because the shape is easy to remember without a card.
Warm-up: 300 easy, mixing strokes.
Main: 50, 100, 150, 200, 150, 100, 50 freestyle with 15 to 20 s rest after each.
Cool-down: 200 easy.
Swim the climb at a comfortable, steady effort and pick up the pace on the way down, so the final 50 is the fastest of the set. Swimming the pyramid twice turns it into a 2,100 m session; adding a 300 at the top makes it 1,600 m.
5
Descending 100s on the Pace Clock
About 2,000 m, 45 to 50 minutes. Teaches the skill most fitness swimmers lack: changing gear on purpose.
Warm-up: 300 easy, then 4 x 25 build.
Main: 3 rounds of 4 x 100 on a fixed interval, each 100 faster than the one before. Swim 100 easy between rounds.
Cool-down: 200 easy.
Pick an interval that leaves about 20 s rest on the first 100 of each round, for example 2:00 if you swim an easy 100 in 1:40. The first repeat should feel almost lazy and the fourth close to your best, which is harder to judge than it sounds. For a shorter slot, drop to two rounds and 1,500 m.
6
Negative Split 200s
About 1,900 m, 45 to 50 minutes. A pacing lesson for anyone who sprints the first length and hangs on for the rest.
Warm-up: 300 easy, then 4 x 50 build, 15 s rest.
Main: 6 x 200 with 20 s rest. Swim the second 100 of every 200 faster than the first.
Cool-down: 200 easy.
Check the clock at the 100 mark of each repeat: a 2:02 first half followed by a 1:58 second half is exactly the idea. Keep the gap small; a ten-second difference usually means the first half was too easy rather than the second half being strong. Four repeats make a 1,500 m session, eight a 2,300 m one.
7
Broken 400s
About 1,800 m, 45 minutes. Lets you swim faster than your straight 400 pace for the full distance, with brief pauses to make it possible.
Warm-up: 400 easy, including a few fast 25s.
Main: 3 x 400, each broken into 4 x 100 with 10 s rest at every wall stop. Take 1 minute easy between 400s.
Cool-down: 200 easy.
Add up the four swim times of each 400, leaving out the rests, and try to beat your best continuous 400. That total is the number to write on the card. As fitness builds, cut the rest to 5 s, then break the 400 into two 200s instead.
8
Sprint 25s and 50s
About 1,500 m, 35 to 40 minutes. A short, sharp session for days when you want speed rather than mileage.
Warm-up: 400 easy, finishing with 4 x 25 building to fast.
Main: 3 rounds of 4 x 25 all-out with 30 s rest, then 100 easy. Follow with 4 x 50 fast with 1 minute rest.
Cool-down: 300 easy, mixing strokes.
The long rests are the point: every 25 should be as quick as the first, and if one drops off badly the rest was too short. Keep your stroke long instead of thrashing. Because it is low in distance, this one slots in well before work or the day after a long swim. Add a fourth round for 1,700 m.
9
Individual Medley Session
About 1,500 m, 40 to 45 minutes. Uses all four strokes, which spreads the work across more muscles and breaks up a freestyle-only week.
Warm-up: 300 easy, any strokes.
Main: 8 x 100 individual medley, 25 of each stroke in the order butterfly, backstroke, breaststroke, freestyle, with 20 s rest. Then 4 x 50, one of each stroke in reverse order, with 15 s rest.
Cool-down: 200 easy.
Butterfly is where most fitness swimmers run into trouble: swap it for single-arm butterfly or freestyle and the session still works. Breaststroke kick can strain the knees, so ease into it if it is unfamiliar. Scale with 6 or 10 x 100.
10
Pull Buoy and Paddles Strength Set
About 1,900 m, 45 to 50 minutes. An upper-body session that also shows how much your legs normally hold you up.
Warm-up: 300 easy swim, then 200 kick.
Main: 4 x 300 pull with a buoy between the thighs and 30 s rest. Add paddles on the second and fourth 300.
Cool-down: 200 easy swim, no gear.
Focus on a long catch and pushing water back past your hips rather than counting lengths. Start with small paddles and leave them out altogether if your shoulders ache. Three repeats make a 1,600 m session. Swimmers whose hips sink often feel the buoy lift them, a useful hint about body position.
11
Kick-Heavy Leg Session
About 1,600 m, 45 minutes. Many lap swimmers barely kick, and this session fixes that without turning into a drill class.
Warm-up: 300 easy swim.
Main: 8 x 50 kick with a board, 15 s rest. Then 4 x 100 swim at moderate pace, 15 s rest. Then 6 x 50 kick, alternating fast and easy, 20 s rest.
Cool-down: 200 easy swim.
Kicking is slow, so this takes longer than the distance suggests; leave room in your lane slot. Kick from the hips with loose ankles rather than bending at the knee. Short fins are fine on the second kick block if your ankles are stiff. For a shorter session, drop the 4 x 100.
12
SWOLF Efficiency Session
About 1,300 m, 35 to 40 minutes. For swimmers who have plateaued on effort alone and want to swim smoother rather than harder.
Warm-up: 300 easy.
Main: 8 x 50 with 20 s rest. On each, count strokes (every hand entry) and note the time. Add the two together per length for your SWOLF score. Swim four relaxed, then four trying to lower the score. Follow with 4 x 100, holding your lowest stroke count, 20 s rest.
Cool-down: 200 easy.
Lower is better, but gliding to cut strokes only slows the clock, so the score will not improve that way. Garmin swim watches calculate it for you.
13
Bilateral Breathing Session
About 1,900 m, 45 to 50 minutes. Builds comfort breathing to both sides, which evens out a lopsided stroke.
Warm-up: 300 easy, breathing every two or three strokes.
Main: 4 x 100 breathing every 3, 15 s rest. Then 4 x 100 alternating every 3 and every 5 by length, 20 s rest. Then 4 x 50 breathing every 5, 20 s rest. Finish with 400 steady, breathing every 3.
Cool-down: 200 easy.
This is about rhythm, not lung capacity. Breathe whenever you need to rather than forcing a pattern, and never hyperventilate before a length or swim breath-hold lengths underwater: both are linked to blackouts in the water. For a shorter session, drop the 400.
14
Broken 1,500 Endurance Swim
About 2,000 m, 50 to 60 minutes. The long day of the week, built around a 1,500 m main set that breaks a big distance into friendly pieces.
Warm-up: 300 easy, mixing strokes.
Main: 3 x 500 freestyle with 30 s rest, each 500 a little faster than the last.
Cool-down: 200 easy.
The rests make a long swim manageable for anyone who usually stops at 1,000 m, and the gentle descend keeps the middle third from turning into a daydream. Once it feels comfortable, change to 2 x 750, then a straight 1,500. Slower swimmers who will not fit 60 minutes can cut to 2 x 500 for 1,500 m in all.
15
30-Minute Express Session
About 1,300 m, 30 minutes. For the mornings when the lane slot is short but you still want a proper workout.
Warm-up: 200 easy.
Main: 10 x 100 with 15 s rest, alternating moderate and fast.
Cool-down: 100 easy.
There is no wasted distance here: the alternating pattern gives you real speed work without needing to recover between blocks. It fits half an hour for anyone swimming a 100 in roughly 2:00 or quicker, rest included. Slower swimmers can do 8 x 100 for 1,100 m; quicker ones can make the fast 100s faster rather than adding more.
16
Easy Mixed-Stroke Recovery Swim
About 1,200 m, 30 minutes. The session for the day after a hard set, when you want to move without adding fatigue.
Warm-up: 200 easy freestyle.
Main: 3 rounds of 100 freestyle, 50 backstroke, 50 breaststroke, 50 kick and 50 choice, all easy with 10 s rest between pieces.
Cool-down: 100 easy, any stroke.
Keep every length conversational; if you are breathing hard, slow down. Backstroke gives the shoulders a different movement after a week of freestyle, which is part of why it is here. Skip the breaststroke if your knees are sore. Two rounds make a 900 m version that fits a very short slot.
