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Swimmer

The swimmer is a face-down drill where opposite arm and leg lift and lower in a steady flutter, like freestyle swimming on land. Maddy uses it to build endurance in the spinal erectors, glutes, and rear shoulders — the muscles that hold posture when everything else fatigues. Coached by Maddy (NASM-CPT) — these are the exact form cues he gives on every client's first week.

Muscles worked

Lower back · erector spinae Glutes · gluteus maximus Hamstrings Rear shoulders · posterior deltoid

Sets & reps by goal

GoalSets × RepsRest
Strength3 × 20 s with slow, deliberate switches60 s
Muscle3 × 30-40 s steady flutter45-60 s
Endurance2-3 × 60 s continuous30-45 s

Rep ranges per Helms 2014 · Schoenfeld 2016.

Level — Intermediate

Intermediate; keeping the pelvis still while the limbs alternate is what separates it from a beginner drill.

Proper form — 5 cues

  1. Lie face down, arms extended ahead, toes long behind you.
  2. Lift the opposite arm and leg a few centimetres, then switch in rhythm.
  3. Keep both hip bones pressed into the floor the entire time.
  4. Reach through the moving fingertips and toes rather than lifting them higher.
  5. Hold the head still, eyes down, neck in line with the spine.

Breathing: Steady rhythmic breathing — never hold it; a common pattern is exhaling over four switches, inhaling over four.

The 3 mistakes Maddy corrects most

Rocking and rolling the hips with each switch.. The roll means momentum is swinging the legs instead of the glutes lifting them, and the low back absorbs the wobble. Fix: Slow the tempo until the hips stay dead level; imagine balancing a cup of water on your sacrum.
Bending the knees to kick the feet up.. A bent-knee kick comes from the hamstrings alone and shortens the lever the glutes are supposed to move. Fix: Keep the legs long and let each lift be small — a straight, low leg beats a high, bent one.
Speeding up until the flutter becomes a splash.. Past a certain speed the muscles stop controlling each lift and the drill loses its endurance-building tension. Fix: Set a metronome pace of roughly one switch per second and hold it for the whole interval.

Common questions

Swimmer vs superman — what's the difference?

The superman lifts all four limbs at once and holds; the swimmer alternates opposite limbs continuously. The superman builds a stronger single contraction, while the swimmer builds endurance and anti-roll control because the trunk must stay level as the limbs trade places. They pair well in the same session — superman for the squeeze, swimmer for the staying power.

Why do I feel swimmers in my lower back and not my glutes?

Almost always because the legs are lifting too high, which tips the work up the chain into the spinal erectors. Lower each leg lift to a few centimetres, squeeze the glute before the leg rises, and press the hip bones down. If the sensation is effort, that is the erectors doing their job; if it is pain, shrink the range further or shorten the interval.

How long should a swimmer interval last?

Start at 20 seconds of strict, level-hipped fluttering, and only add ten seconds when the entire interval stays clean. Sixty seconds continuous is a solid benchmark for most clients; beyond that, progress by slowing the switches and reaching longer rather than piling on more time. Sloppy minutes teach sloppy posture — the opposite of the point.

Related exercises

Prone Alternate Hand and Leg RaiseLower back · Glutes SupermanLower back · Glutes Bird DogDeep core · Lower back Bird Dog (Advanced)Deep core · Lower back Bird Dog (Modified)Deep core · Lower back

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