What is a good 45-minute swim workout?

One that fits in about 40 minutes of prescribed work, so the last 5 minutes stay free for transitions and slower laps. For steady aerobic fitness, the 1,900m endurance session on this page (300 warm-up, four drill 50s, six 200s at about 1:50/100m, 200 cool-down) adds up to 39:50 in a 25m pool.

How far can you swim in 45 minutes?

It depends on pace, rest and how often you stop. The four sessions here cover 1,500m to 1,900m, including rest after every repeat, and finish in 38 to 40 minutes at the stated paces. A 1,900m session is 76 lengths of a 25m pool. Compute your own total as distance ÷ 100 × your pace per 100m, plus the rest after each repeat.

Is 45 minutes enough to build endurance?

This page does not claim a fitness result. What the endurance session does is give you 1,200m of main set at an effort you can hold from the first repeat to the last. That is a long steady block for a 45-minute slot, but you decide whether the effort suits your fitness today.

What if I swim slower than 1:50 per 100m?

Remove repeats instead of rushing the rest. Each repeat has a stated clock cost in its card. A slower swimmer drops one main-set repeat, which frees about 4 minutes in the endurance session or about 2 minutes in the tempo session.

Can I do these in a 50m pool?

The distances stay the same, but the pace per 100m can change with fewer turns, and the 25m drill lengths in the technique session need a mid-pool marker or a 25m pool. Time the first main-set repeat and adjust the budget from there.

45-Minute Swim Workout

Four 45-minute pool sessions for endurance, tempo, technique and triathlon. Each shows the clock math for swimming, rest and transitions in a 25m pool.

A 45-minute swim workout fits when you plan about 40 minutes of swimming and rest and keep the last 5 free for transitions. To build cardiovascular endurance, start with session 1: 1,900m in a 25m pool, with six steady 200s as the main set. At about 1:50/100m it adds up to 39:50. The tempo, technique and triathlon sessions below use the same budget.

Published November 3, 2026

How to fit a workout into 45 minutes

Swim time for a block is distance ÷ 100 × your pace per 100m. Rest adds the number of repeats × the rest per repeat. Six 200s at 1:50/100m take 6 × 3:40 = 22:00 of swimming and 6 × 0:20 = 2:00 of rest, which makes 24:00. Add the warm-up, drills and cool-down, and the whole session lands near 40 minutes.

These sessions assume a 25m pool and the paces named on each card: 2:00/100m for easy swimming, 1:50 for steady aerobic work, 1:40 for tempo and 2:15 to 2:30 for drills and kick. Your own paces will differ. Time the first repeat of the main set, compare it with the card, and adjust the number of repeats before you start the second block.

Session 1: endurance, 1,900m of steady swimming

This is the session for building aerobic endurance in 45 minutes. The main set is six 200s with 20 seconds of rest, so the work is long enough to settle into a rhythm and the rest is short enough to stay in that rhythm. The aim is a steady 3:40 per 200, not a fast first repeat followed by a slower last one. For a longer endurance block, the 2,500m swim workout adds distance.

Session 2: tempo, ten 100s against the clock

Ten 100s at 1:40 with 20 seconds of rest take 20:00 together. That block is the one to shorten if your 100s run slower: removing one repeat frees 2:00. Rest here is a fixed 20 seconds from the wall touch, which is different from a send-off. The guide to choosing a send-off interval shows how to turn the same set into departures on the pace clock, and the interval training guide explains the zones.

Session 3: technique, 1,500m of drills and transfer

Drills are slower than swimming, and good drill practice needs rest between pairs, so this session covers less distance on purpose. Each drill length is followed by a normal length so you can compare the two. These drills are not diagnostic tests. Use ordinary freestyle whenever a drill disrupts your breathing. For shorter technique work, see the 30-minute swim workouts , or start from the beginner swim workouts .

Session 4: triathlon, an unbroken 800 and short surges

A triathlon swim has no wall rests, so this session swims 800m without stopping and then practises changing pace inside a 100. Sighting practice in the pool means lifting the eyes briefly, not stopping; the open water sighting guide covers the open-water version. It spares the most time of the four sessions, because the unbroken 800 has no rest in it.

For a full progression, the triathlon swim training plan places sessions like this one inside a week.

If the clock runs over: cut repeats, not warm-up

The cost of a repeat is its swim time plus its rest. In the endurance session a 200 costs 3:40 + 0:20 = 4:00. In the tempo session a 100 costs 1:40 + 0:20 = 2:00. In the technique session a transfer 100 costs 2:00 + 0:20 = 2:20, and in the triathlon session a steady and surge 100 costs 1:45 + 0:20 = 2:05. If your first main-set repeat is 10 seconds per 100m slower than the card, remove one repeat and keep the warm-up and cool-down.

To change a session, open a card in the free workout builder , edit the repeats and see the new total. The pace clock guide helps you hold the rest while you swim, and the Garmin export guide shows how to put the edited session on a watch.

These are AquaPlan coaching examples informed by USMS guidance on workout structure and recovery and USMS guidance on drills and full-stroke application . The paces, clock totals and prescriptions are calculated examples for a 25m pool, not timed trials, and not a promise of improvement. Stop a session when you feel unwell.

45-Minute Endurance Session

1,900m of steady aerobic swimming. Clock at 1:50/100m for the main set: 6:00 + 5:30 + 24:00 + 4:20 = 39:50 with rest counted after every repeat, so about 5 minutes stay free in a 45-minute slot. Each main-set 200 costs 4:00 with its rest. · 1900m total

300m Easy freestyle warm-up — GA1 · About 2:00/100m. Let the breathing settle before the first drill.
4 × 50m Catch drill — TU · Rest 15s between repeats · Fist drill on odd repeats, fingertip drag on even ones, at about 2:15/100m. Keep the effort easy.
6 × 200m Steady aerobic 200s — GA2 · Rest 20s between repeats · Aim for 3:40 per 200, the same on repeat six as on repeat one. Hold an effort of about 5/10. If repeat three already takes 3:55, stop at five.
200m Easy cool-down — ReKom · About 2:10/100m. Swim it easy and aim to be finished by minute 40.

45-Minute Tempo Session

1,900m with ten threshold-paced 100s. Clock: 6:00 + 4:40 + 20:00 + 5:00 + 4:20 = 40:00, rest counted after every repeat, about 5 minutes spare. Each tempo 100 at 1:40 costs 2:00 with its rest. · 1900m total

300m Easy freestyle warm-up — GA1 · About 2:00/100m.
4 × 50m Build 50s — GA2 · Rest 15s between repeats · About 1:50/100m. Start each 50 easy and finish it quicker than you started.
10 × 100m Tempo 100s — WA · Rest 20s between repeats · Aim for 1:40 per 100. It should feel hard but repeatable. If two 100s in a row land 3 seconds slower, stop at that point and move on to the fast 50s.
4 × 50m Fast 50s — SA · Rest 30s between repeats · About 1:30/100m, so 45 seconds per 50. Keep the stroke long. Skip this block if the tempo set left your technique ragged.
200m Easy cool-down — ReKom · About 2:10/100m.

45-Minute Technique Session

1,500m of drills and transfer swimming. Clock: 4:00 + 6:20 + 8:45 + 8:45 + 9:20 + 2:10 = 39:20, rest counted after every repeat, about 5½ minutes spare. Drills are slower than swimming, so the distance is smaller than in the other sessions. · 1500m total

200m Easy freestyle warm-up — GA1 · About 2:00/100m.
4 × 50m Kick 50s — GA1 · Rest 20s between repeats · About 2:30/100m with a board. Keep the kick compact and stop a repeat early if your thighs burn. · kick
6 × Fist and open-hand comparison — Rest 20s between rounds · Swim both lengths without a pause between them. Rest after the pair.
1. 25m Relaxed fists — TU · About 2:30/100m. Close the hands gently and notice the pressure on the forearm.
2. 25m Open hands — GA1 · About 2:00/100m. Keep the same pressure you felt with closed hands.
6 × Catch-up and full-stroke comparison — Rest 20s between rounds · Swim both lengths without a pause between them. Rest after the pair.
1. 25m Catch-up freestyle — TU · About 2:30/100m. Touch hands in front before the next arm starts.
2. 25m Normal freestyle — GA1 · About 2:00/100m. Carry the longer reach into the continuous stroke without gliding.
4 × 100m Transfer 100s — GA1 · Rest 20s between repeats · About 2:00/100m. Pick the one cue that made easy swimming feel smoother and keep only that one.
100m Easy cool-down — ReKom · About 2:10/100m. Swim it without a technical task if concentrating makes you tense.

45-Minute Triathlon Swim Session

1,900m built around one unbroken 800m and short surges. Clock: 6:00 + 5:00 + 14:40 + 8:20 + 4:20 = 38:20, rest counted after every repeat, about 6½ minutes spare. The continuous 800 at 1:50/100m is 14:40 with turns included. · 1900m total

300m Easy freestyle warm-up — GA1 · About 2:00/100m.
4 × 50m Sighting 50s — GA1 · Rest 15s between repeats · About 2:00/100m. Lift your eyes to look down the lane every fourth stroke, then put the face back in without a pause. Pick a spot on the far wall.
800m Unbroken steady swim — GA2 · About 1:50/100m. Touch the wall and go: no stopping at the end of a length, as if there were no wall. If your turns are slow, add the time to the budget before you start.
4 × Steady and surge 100s — Rest 20s between rounds · Each round is one 100m with no stop at the 50. Rest after the round.
1. 50m Steady 50 — GA2 · About 1:50/100m.
2. 50m Surge 50 — WA · About 1:40/100m, like passing a swimmer at a buoy. Settle back to steady on the next wall.
200m Easy cool-down — ReKom · About 2:10/100m.

Try it in AquaPlan

free workout builder

Article source

Written and maintained by AquaPlan Team, Swim Training & Product.

The AquaPlan team builds swim-training software for structured pool workouts, Garmin-compatible FIT export, printable workout PDFs, and progress tracking.

Focus areas: Structured swim workout design, Garmin-compatible FIT file export, Pool training plans and workout-library systems, Swim training tools for web, iOS, and Android.

Editorial standard: AquaPlan is built by lifelong swimmers — 20+ years in the water, competitive racing, and countless hours on deck. Our training guides come from that experience, not a content mill.

About AquaPlan