How to Improve Swimming Efficiency: Swim Faster with Less Effort

Quick summary: Efficiency is measured with SWOLF (time + strokes per length) and strokes per length. The 5 keys: reduce frontal drag, maximize distance per stroke, use body momentum, effective roll and economical kick. A SWOLF of 30-35 in 25m is excellent.

Swimming efficiency is defined as swimming faster with less effort. It's the factor that most separates experienced swimmers from beginners — and the good news is it can be improved at any age. While fitness has genetic limits, technical efficiency has a much higher ceiling.

How to measure efficiency

SWOLF (Swimming Golf)

SWOLF = time in seconds + number of strokes per length. The lower the SWOLF, the more efficient you are.

Strokes per length

Count how many strokes you need per 25m or 50m length. Reducing 1-2 strokes per length without losing speed indicates better efficiency.

5 keys to becoming more efficient

1. Reduce frontal drag

Keep horizontal body, high hips and aligned head. Every degree of inclination multiplies drag. Avoid the most common position errors. Streamlined position is responsible for 60-70% of your efficiency.

2. Maximize distance per stroke

Fully extend the arm at entry, make a deep catch with high elbow (EVF), and finish the push to the thigh. More distance per stroke = fewer strokes per length = more efficiency.

3. Use momentum

After each stroke, there's a glide moment. Don't rush to start the next stroke. "Feel" the water pass and let the body advance before pulling again.

4. Effective body roll

45-60° body rotation allows a longer stroke, reduces frontal drag and facilitates breathing. Swimming "flat" is one of the biggest efficiency killers.

5. Economical kick

An excessive kick consumes a lot of energy (legs use large muscle groups). For long distances, a 2-beat kick is more efficient. Save the 6-beat kick for sprints and speed sets.

Golden principle: Efficiency is trained when you're NOT tired. Efficiency drills should be done at the beginning of the session, after warm-up. Under fatigue, your body resorts to established patterns — not the new, more efficient ones you're trying to learn.

Drills to improve efficiency

With Swimer, every session includes technique drills to progressively improve your efficiency. Calculate your CSS and start swimming better, not just more.

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