For many triathletes, swimming is the discipline that feels most technically demanding. You can be in great shape but still struggle in the water if your technique isn't in place.
The truth is simple:
Good swimming technique beats brute strength. Every time.
In this post, I will review the most important elements of swimming technique, which exercises create the most value, and how different training zones are used correctly in swimming training towards Ironman.
1. Good swimming starts with body position
The most important prerequisite for effective swimming is a stable and streamlined body position.
You should aim for:
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Hips and legs close to the surface
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Long body without a “bend” in the hip
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Relaxed head position with gaze slightly downwards
When the body is positioned correctly in the water, resistance is significantly reduced. This means that each arm stroke provides more propulsion – without additional energy consumption.
Key focus: Streamline, balance and tension in the core.
2. Breathing – calm creates speed
Many swimmers lose technique the moment they breathe.
Effective breathing:
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Short and relaxed inhalation
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Controlled exhalation underwater
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No lifting of the head
If the head is lifted, the legs sink. When the legs sink, the resistance increases. It quickly becomes a vicious circle.
Practice breathing separately and consciously. This provides significantly better stability.
3. Arm hold and catch in the water
A strong arm grip is not about “shoveling water”, but about creating a stable grip.
Focus areas:
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Early catch in the water
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Forearm and hand work as one surface
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Stable elbow position
The goal is to maintain constant pressure backward throughout the entire pull.
4. Legwork – stability before speed
For triathletes, the legs are primarily a stabilizing tool.
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Small, relaxed leg kicks
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Stable rhythm
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No excessive force
- Six-Six beat - 6 leg kicks per cycle
The legs should help with balance and rhythm – not drain energy.
5. The most important technical exercises
Here are some of the most valuable types of exercise:
Shutter exercises
Trains grip and water feel.
One-arm swimming
Improves body rotation and balance.
Catch-up drill
Creates length in the armhole.
Kick on the side
Strengthens body position and breathing.
Fingertip drag
Promotes high elbow in forward movement.
Balance leg
Improves balance and rotation.
Hip, Shoulder & Head
Improve your recovery and set.
These exercises should be regularly included in warm-ups or technique blocks.
6. Training zones in swimming – when and why
A good swimming workout consists of several intensity zones.
Aerobic Base
Calm, controlled swimming.
Builds endurance and technical stability.
Objective: To be able to swim for a long time with good technique.
AT (Anaerobic Threshold)
Moderate-hard intensity.
Trains the ability to maintain pace over a longer period of time.
Purpose: Race pace for many triathletes.
VO2 max
High intensity with short intervals.
Purpose: Increase maximum oxygen uptake and capacity.
Anaerobic training
Very short, hard intervals.
Purpose: Speed, power and neuromuscular strength.
7. How to combine technique and fitness
Technique should not only be trained slowly.
It must also function under load.
An effective model:
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Technical block
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Aerobic work
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Intensity block
In this way, the technique is transferred directly to race situations.
8. Consistency beats everything
Small improvements every week beat sporadic big workouts.
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Fixed technical focus
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Repetition
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Structure
This is how stable progress is created.
Ending
Swimming technique is not magic.
It is systematic work with the same basic elements over and over again.
When body position, breathing and arm movement work together, swimming becomes easier, faster and more controlled.
And that is precisely the foundation for a strong Ironman swim.