Swimming: A Complete Guide
Quick Intro
Swimming is a mat Pilates exercise performed lying face down with the arms and legs extended and the chest and legs lifted off the mat, alternating opposite arm and leg in a rapid flutter pattern, right arm with left leg, left arm with right leg, while breathing in for five counts and out for five counts. It’s the fastest exercise in the classical mat order, sustaining a continuous, quick alternation rather than a single controlled rep.
Equipment Needed
No equipment is required. A Yoga Mat underneath is an optional way to take the edge off a hard floor beneath the hips and ribs.
Why It Matters
Maintaining the lifted extension asks for back flexibility, alternating opposite limbs rapidly demands timing and sustaining both for a full count of breaths takes staying power. The lower back muscles (erector spinae) hold the sustained extension throughout, and the largest glute muscle (gluteus maximus) keeps the legs lifted through the flutter. A muscle at the back of the thigh (hamstrings, biceps femoris) drives each leg’s alternating beat, the rear of the shoulder (deltoid, posterior) powers the arm flutter and the broad muscle spanning the upper back and neck (trapezius) supports the lifted upper body throughout.
When to Do It
Swimming works well in the prone portion of a Pilates mat session, usually placed among the other back-extension exercises. Two to three sessions a week is a reasonable pace for building this sustained flutter.
Anyone with a current lower back issue should get individual guidance before adding this exercise, since sustaining a lifted extension for a full count of breaths places ongoing demand on the lumbar spine.
Getting Ready
A few rounds of a simpler back extension, without the flutter, warm up the spinal extensors before the rapid alternation is added. A few slow, deliberate opposite-arm-and-leg lifts preview the coordination pattern the full flutter builds on.
Step-by-Step Instructions
1. The setup. Lie face down, arms and legs extended, chest and legs lifted off the mat.
2. The flutter. Begin alternating opposite arm and leg in a rapid, continuous flutter.
3. The breath. Inhale for five counts of the flutter, then exhale for five more counts, maintaining the pace throughout.
4. The lower. Lower the chest and legs back to the mat with control once the set is complete.
How Many, How Often
Swimming is dosed by total count, with each five-count inhale or exhale phase of the flutter counting toward the set.
| Level | Where you’re at | What to do |
|---|---|---|
| Beginner | New to sustaining the lifted extension through the flutter | 2 sets of 10 counts, keeping the lift smaller |
| Intermediate | The extension holds steady through a longer flutter | 2 to 3 sets of 20 counts |
| Advanced | Comfortable with a full extension through the classical count | 3 sets of 30 to 50 counts |
The core staying braced so the lower back doesn’t overextend matters more here than how fast the flutter moves, since speeding through the pattern with a collapsing core trades control for a faster-looking flutter.
Modifications and Variations
As an easier version, Swimming — Slow Alternation slows the flutter pace considerably, letting the lifted extension and the coordination pattern both be learned without the speed demand of the full version.
As a harder version, Swimming — 50 Counts extends the total count of the flutter to the full classical fifty, asking the back extensors to sustain the lifted position for considerably longer.
Common Mistakes to Avoid
Letting the lower back overextend as fatigue builds. Allowing the lumbar spine to arch more sharply as the set goes on adds unnecessary strain right where it’s least wanted. Keeping the core braced throughout is what protects the lower back during the flutter.
Losing the flutter’s rhythm partway through the count. Letting the opposite-arm-and-leg pattern become uneven or lose its alternating rhythm as the set continues turns a coordinated exercise into an uncoordinated flail. Keeping the beat steady, even if that means a shorter set, keeps the coordination work intact.
Rushing the breath count to finish the set faster. Speeding through the five-count inhale and exhale to shorten the set skips the paced breathing this exercise is built around. Matching the flutter’s pace to the breath, not to a rush to finish, keeps the exercise doing what it’s meant to.
After Your Set
Sitting back into a stretch with the hips toward the heels and the arms extended forward releases the lower back after a set built around sustained extension. A gentle cross-body shoulder stretch on each arm eases out the shoulders that powered the rapid arm flutter.
Going Deeper
This exercise usually works well as a test of coordination under fatigue, since keeping a rapid opposite-arm-and-leg alternation steady while the core braces against an overextending back asks for staying power on top of the coordination. As the count gets longer, the lower back tends to take over more of the extension as the upper back and glutes tire. Keeping the core braced through the whole count, even if that means a shorter set at first, builds endurance faster than pushing through with an overextended spine.
Someone new to this exercise generally manages a slower, shorter flutter within a few sessions, then works toward the fuller classical count over three to four weeks.
How to Know You’re Improving
- A lifted extension that stays smooth through the whole spine, not concentrated in the lower back
- A flutter rhythm that stays steady from the first count to the last
- A breath count that stays paced to the finish
- A total count that grows while the extension and rhythm both stay controlled
A lower back that never overextends through the flutter matters more than how fast the limbs move.
Muscles Worked
- Erector Spinae (the lower back muscles, holding the sustained extension throughout)
- Gluteus Maximus (the largest glute muscle, keeping the legs lifted through the flutter)
- Biceps Femoris (a muscle at the back of the thigh, driving each leg’s alternating beat)
- Posterior Deltoid (the rear of the shoulder, powering the arm flutter)
- Trapezius (the broad muscle spanning the upper back and neck, supporting the lifted upper body throughout)
FAQ
Why is this exercise dosed by count instead of reps? The flutter is a continuous, rapid alternation with no clean break between one lift and the next, so counting the total beats of the pattern, paced to the breath, is the more natural way to measure a set here than counting individual lifts.
Is it normal for the flutter to slow down as the set goes on? Yes, some natural slowing as fatigue builds is common, especially when first learning the pattern. Keeping the rhythm steady even at a slightly reduced pace is more valuable than rushing to maintain speed at the cost of control.
Is some lower back or shoulder fatigue after this exercise normal? Yes, fatigue through the lower back and shoulders after a full count is expected. Sharp pain concentrated in the lumbar spine is a different matter, worth easing off for and mentioning to a doctor or physical therapist if it continues.
Is a slower flutter acceptable if the full pace feels like too much? Yes, a slower pace is a reasonable way to build the pattern before reaching for the full speed, and Swimming — Slow Alternation is built that way.
How often should Swimming be practiced? Two to three times a week, as part of the prone portion of a broader mat session, is enough repetition to build this sustained flutter.
Related to Swimming — Slow Alternation as the easier version performed at a slower pace and Swimming — 50 Counts as the harder version extending the flutter to the full classical count.