Why Do My Legs Sink When I Swim? Causes and Fixes

Your legs usually sink in freestyle because your body is not balanced horizontally in the water. Looking forward, lifting your head to breathe, pressing down with your upper body, holding tension through your hips or using an ineffective kick can all push the legs lower and create unnecessary drag.

Sinking legs are extremely common among beginner and developing swimmers. The problem is often described as weak kicking, but simply kicking harder is rarely the complete solution.

Efficient freestyle depends on body position, breathing, balance, alignment and propulsion working together. Once the underlying cause is corrected, many swimmers find that their legs rise without needing to produce a powerful or exhausting kick.

Why sinking legs make swimming harder

Water creates resistance against every part of your body. A swimmer travelling in a long, horizontal position presents a relatively small frontal area to the water. When the hips and legs drop, the body moves forward at an angle and pushes a larger area through the water.

This additional resistance is commonly called drag. As drag increases, you must generate more propulsion simply to maintain the same speed.

A low-leg position can create several secondary problems:

• You use more energy at every pace
• Your kick becomes larger and less controlled
• Your breathing may feel rushed
• Your stroke rate may increase without improving speed
• Your lower back may become tense
• Long-distance swimming becomes much harder to sustain

How body balance works in swimming

The human body does not float evenly. The chest contains the lungs and is generally more buoyant, while the hips and legs contain denser muscle and bone.

This difference can naturally encourage the upper body to float higher than the legs. Good swimmers manage this imbalance through head position, alignment, controlled pressure through the chest and forward momentum.

Your body behaves somewhat like a seesaw. When the head and upper chest rise unnecessarily, the hips and legs tend to move downward. When the head remains neutral and the upper body settles into the water, the hips often rise.

This does not mean you should force your head or chest aggressively downward. Excessive pressure can create tension and push the shoulders too deep. The adjustment should be gentle.

Why do your legs sink when you swim?

Several technical and physical factors can create the same visible problem. Identifying the correct cause is important because the best solution for one swimmer may not help another.

1. You are looking too far forward

Head position is one of the most common causes of sinking legs. When you look directly toward the end of the pool, the forehead rises and the neck extends. This lifts the front of the body and encourages the hips and legs to drop.

Your head should remain in a relatively neutral position. Look mostly downward, with your eyes directed toward the pool floor slightly ahead of you.

2. You lift your head when breathing

Freestyle breathing should be created primarily through body rotation. If you lift the head upward to move the mouth clear of the water, your upper body rises and the legs often sink immediately.

Rotate the head together with the shoulders and torso. Aim to keep one goggle in or close to the water when inhaling. The mouth can reach the air through the small trough created beside the head rather than by lifting the entire face.

1. Begin rotating through the body

   Allow the shoulders and hips to rotate together as the pulling arm moves through the stroke.

2. Turn rather than lift

   Rotate the head to the side while maintaining a long neck. Avoid pushing the forehead upward.

3. Keep the breath small

   Take a quick, relaxed inhalation rather than holding the head to the side for an extended period.

4. Return the face smoothly

   Place the face back into the water before the recovering arm enters and allow the head to return to neutral.

If your legs sink only when you breathe, the breathing movement is more likely to be the problem than your general kicking ability.

3. You are holding your breath

Many beginners inhale, place the face in the water and hold their breath until the next breathing opportunity. They then attempt to exhale and inhale during the same short head turn.

This creates urgency, tension and a longer breathing movement. The head may lift, the leading arm may press downward and the hips may lose stability.

Continuous exhalation also helps reduce tension through the neck, chest and shoulders. A relaxed body is generally easier to align than a rigid body.

4. You press downward with the leading arm

Some swimmers attempt to lift the head by pressing the leading hand and forearm downward. This may briefly raise the mouth, but it also pushes the upper body upward and contributes to the legs dropping.

The front arm should support a long line and then begin creating backward propulsion. It should not function as a lever used to hold the head above water.

5. You bend at the hips

A swimmer can have a reasonable head position while still allowing the body to fold slightly at the hips. This may happen because of poor body awareness, excessive tension, fatigue or an attempt to force the legs upward.

Think about creating one long line from the crown of the head through the spine and toward the feet. The abdominal muscles should be gently active, but you should not brace as hard as possible.

Excessive arching through the lower back can also make the legs appear lower. Gently bring the ribs and pelvis into a more neutral relationship without rounding the spine.

6. Your kick comes mainly from the knees

An efficient freestyle kick begins at the hips and travels through relaxed knees and ankles. The knees bend slightly, but they should not drive a large pedalling action.

When the kick comes primarily from the knees, the thighs may drop below the body. The lower legs then push water forward instead of backward, increasing resistance.

Your kick does not need to be powerful to support good body position. For distance swimming, a small and continuous kick can help maintain rhythm and alignment without using excessive energy.

7. Your ankles are stiff

Flexible ankles allow the feet to extend behind the legs and act like small fins. Stiff ankles may leave the feet pointing more toward the pool floor, which increases drag and reduces the effectiveness of each kick.

This is particularly common among runners and cyclists because their sports do not require the same degree of ankle plantar flexion used in swimming.

Ankle mobility can improve gradually through gentle exercises, but avoid aggressive stretching that causes pain around the front of the ankle, Achilles tendon or foot.

8. You lose balance at very low speed

Forward movement helps support body position. When you swim extremely slowly or pause for a long time between strokes, the legs may begin to sink because there is less water moving around the body.

This does not mean you must swim hard. It means the stroke should maintain enough continuity to avoid repeated loss of momentum.

Common sources of dead time include:

• Pausing the leading hand for too long
• Stopping the kick while breathing
• Finishing one stroke before beginning the next
• Gliding without maintaining alignment
• Taking an unusually long breath

9. Your body naturally carries less buoyancy in the legs

Swimmers differ in body composition, bone density, muscle distribution, lung volume and natural buoyancy. Some people can float horizontally with very little effort, while others naturally have lower hips and legs.

Lean and muscular legs may be less buoyant than legs containing a higher proportion of body fat. This does not mean that muscular athletes cannot become efficient swimmers. It means they may need to pay closer attention to alignment, head position and continuous propulsion.

Technique can substantially improve body position, but not every swimmer will look identical in the water. The practical goal is to minimise unnecessary drag rather than imitate a specific visual standard.

How to identify why your legs are sinking

Before changing several parts of your stroke at once, use a few simple tests to narrow down the cause.

1. Compare swimming with and without breathing

   Swim a short distance without taking a breath, then repeat while breathing normally. If the legs drop mainly during the second attempt, your breathing movement is likely contributing.

2. Change your eye position

   Swim while looking farther forward, then repeat while looking downward. Notice whether the hips feel lighter when the neck remains neutral.

3. Use a pull buoy

   Place a pull buoy between the thighs and swim without kicking. A major improvement suggests that body position and lower-body drag are important limitations.

4. Use fins briefly

   Short fins can provide feedback about ankle position and continuous propulsion. If your alignment improves dramatically, your kick mechanics or ankle position may need attention.

5. Record yourself from the side

   Underwater or side-view video can reveal head angle, hip position, knee bend and pauses that are difficult to feel while swimming.

How to stop your legs sinking in freestyle

Begin with the changes that affect overall balance before trying to create a stronger kick. For many swimmers, improving the head and breathing position produces the largest immediate benefit.

1. Set a neutral head position

   Look mostly downward and keep the back of the neck long. Avoid repeatedly checking the wall or swimmers ahead during normal pool practice.

2. Let the upper chest settle

   Apply gentle downward pressure through the upper chest without forcing the head or shoulders deep into the water.

3. Exhale while underwater

   Release air steadily so that your breathing turn is short, calm and used primarily for inhalation.

4. Rotate instead of lifting

   Allow the shoulders, torso and hips to rotate together. Turn the head within this movement rather than raising it independently.

5. Maintain a long body line

   Keep gentle tension through the torso so the ribs, pelvis and legs remain connected without making the body rigid.

6. Create a narrow kick from the hips

   Let the legs move with small alternating actions. Keep the knees soft, feet relaxed and kick width relatively narrow.

7. Remove long pauses

   Maintain a continuous relationship between the catch, pull, recovery and kick so your forward momentum does not repeatedly disappear.

Best swimming drills for sinking legs

Drills are most effective when each one addresses a specific limitation. Swim slowly enough to notice the intended sensation, then transfer the same focus into normal freestyle.

Sample body-position swimming session

The following session combines balance work with normal freestyle. Adjust the distances and recovery to match your current swimming ability.

Should you kick harder to keep your legs up?

A stronger kick can raise the legs temporarily, but it may also increase energy use and hide the underlying balance problem.

This is especially important for triathletes and distance swimmers. The legs must remain fresh enough for cycling and running, so an aggressive six-beat kick may not be the most economical solution.

Correct your head, breathing and body alignment first. Then develop a kick that supports the improved position rather than compensating for poor balance.

Should you use a pull buoy?

A pull buoy is placed between the thighs or ankles to increase lower-body buoyancy. It can immediately lift the hips and make freestyle feel smoother.

This makes the pull buoy useful for:

• Demonstrating how a higher body position feels
• Isolating the upper-body stroke
• Reducing leg use during selected sets
• Comparing swimming speed with different body positions
• Supporting technique work during fatigue

However, the pull buoy does not automatically teach you how to maintain the same position without assistance. If nearly every training length is completed with a buoy, the underlying balance, kick or breathing issue may remain unchanged.

Why do your legs stay higher in a wetsuit?

Neoprene contains trapped gas and provides additional buoyancy. Triathlon wetsuits often contain thicker panels around the hips and legs, which can raise the lower body and reduce drag.

This is one reason some triathletes swim noticeably faster in a wetsuit. It improves body position in addition to reducing heat loss.

A wetsuit can help compensate for naturally low legs, but it should not replace basic technique development. Not every race permits wetsuits, and pool swimming normally takes place without one.

Common mistakes when trying to lift the legs

How long does it take to fix sinking legs?

Some swimmers experience an immediate improvement after changing their head position or breathing movement. Developing a stable body position that remains effective during longer, faster swimming usually takes more time.

Consistent feedback is more valuable than completing large volumes with the same technical problem. Video analysis, a coach or an experienced observer can help confirm whether the change is visible.

Frequently asked questions

Final thoughts

Sinking legs are usually a symptom of an overall balance problem rather than a simple lack of kicking strength.

Start by checking your head position and breathing movement. Keep the neck neutral, exhale while the face is underwater and rotate to breathe instead of lifting the head. Then develop a long body line and a narrow, relaxed kick from the hips.

Use drills and equipment to understand the correct position, but regularly return to normal freestyle and practise maintaining the improvement without assistance.

For a complete breakdown of the stroke, read our freestyle swimming guide.