How to Prevent Breaststroke Swimmer's Knee

Co-authored by Zheni Stavre, MD

Last Updated: May 8, 2025

Breaststroke is one of the four widely known swimming styles. It is known for its harmonic movements and the anaerobic capacity it develops. In swimming, like in any other sport, there’s always a chance for injuries. Breaststrokers are known to develop knee problems, as the kick used in this style, requires the swimmer to push with a lot of strength at not usual angle. These injuries can become chronic when not treated appropriately. This article will show you how to prevent knee pain caused by breaststroke kick.

1

Pay attention to your technique.

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The width between the knees when doing the kick varies based on the kind of competitive distance you are specialized in. Usually, sprinters tend to do their kick with their knees closer than mid-distance or IMers. This makes the angle of the knees with the ankles more sharp, which at the end makes sprinters more likely to get knee injuries. The most important thing is to make sure every kick is not out of the boundaries of the knee rotation, especially during the out sweep of the kick. Most injuries happen when swimmers do not pay close attention to their kick technique and end up making the wrong movements while doing the kick.

2

Warm up thoroughly before each swim practice.

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This is the key factor in avoiding knee injuries. Before getting in the water, do some joint movements. It’s always a good idea to start from your ankles up to your neck so you do not miss any part of your body. ^{[1]
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Expert Source

Zheni Stavre, MD
Board Certified Rheumatologist

Expert Interview} Dedicate some time to move your knees around. There are two basic movements:
- Stand up with your feet shoulder-width apart and put your hands on your knees. Bend them forward and return to the initial position.
- Stand up with your feet shoulder-width apart and put your hands on your knees. Bend them forward, then bring them a little to the outside, almost in a circular way, and then return to the initial position. Repeat the exercise, bringing your knees to the opposite sense of the circular movement.
- It is also good for your body to do around 10 minutes of aerobic exercise, such as light rowing, jogging, or jumping rope.

3

Warm up your knees in the water.

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This allows your knees to get used to that movement. In your warm-up, make sure you do some kicking; start slow, but as the warm-up goes on, you can accelerate your kick. A short kicking set during warm-up is also a good idea.

4

Do some kicking drills during warm-up.

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Performing drills makes it easier to execute the proper kick. This will also help prevent injuries. Some of the most well-known drills are:
- 2-kicks-1-stroke: Make one complete breaststroke cycle, and during the gliding part, introduce a second kick and start again. [1]
- 1-kick-2-strokes: Make one complete breaststroke cycle and, taking advantage of the momentum generated from the stroke, make another stroke without the kick and repeat.
- Kicking on your back: Lie on your back in a streamline position and do a breaststroke kick, trying to keep your knees from coming out of the water too much. Additionally, try to make sure the width between your knees does not exceed the usual width. This drill is especially good for swimmers that make the mistake of bringing their legs toward their chest when they kick.
- Kicking with your hands and your back: Lying on your belly, start with your body completely flat in the water with your hands by the side of your legs. Execute a breaststroke kick, allowing your body to follow the undulation movement it produces. After the glide, keep the kicks coming.

5

Communicate with your coach.

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As an athlete, you may perceive your swimming differently than the way you look from afar. Outside the water, the coach might be able to correct different aspects of your stroke. Rely on your coach’s perspective and follow their guidance during practice.

6

Respect your limits.

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During long aerobic sets, you may not feel intense pain because your knees are warmed-up. However, if you start feeling any kind of pain, know when to stop. Sometimes pushing through the pain is not the best answer. The breaststroke is a high-impact stroke, and it’s common—even for professional swimmers—to do their long high-aerobic sets in a different stroke, commonly freestyle.

7

Cool down after your session.

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Doing some cool down stretches is almost as important as warming up. It also helps bring your heart rate down and allows your body’s temperature to go back to normal. Not cooling down after doing a tiring set can bring serious problems to your body, as it needs to remove all the lactic acid that your muscles developed while doing the practice set.

8

Stretch after swimming.

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Stretch the largest muscles in your body. Stretching your legs after swim practice is one of the best ways to ensure an optimal and full recovery from the exercise done. Make sure you stretch the largest body muscles, such as your quads, gluteus, hamstrings, and calves. ^{[2]
X
Expert Source

Zheni Stavre, MD
Board Certified Rheumatologist

Expert Interview} There are several ways to stretch but here are some examples:
- To stretch your quads, stand up with your feet shoulder-width apart next to a wall or another support. Bring one foot back to your gluteus and hold it with your hand. Leave your knees close to each other.
- For a more general stretch, simply stand with your feet together and incline your back towards the floor. Try to touch your feet with your hands and your knees with your head.

9

Commit inside and outside the pool.

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Pay attention to the activities you do outside of practice. Pay attention to the way you run and walk, and make sure it is not affecting your knees. Try to always keep your knees slightly bent. Follow a routine that suits your needs, as well. Once you start getting used to protecting your knees daily, it should start feeling like an unconscious act.
- Use proper shoes. They can be for running, training, or even just for walking; wear shoes that balance your feet and help your knees to stay in the right posture.

10

Strengthen the muscles that surround your knee.

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There are plenty of exercises you can do to strengthen your leg muscles. Even though swimmers do most of their workout in the water, they also need to develop certain strength doing gym workouts or dry lands.

11

Stay hydrated.

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While doing intense workouts, the muscles need to be at optimal conditions in order to work properly and prevent injuries. Your body requires the right kind of hydration so it does not start cramping up in the middle of your practice. It’s important that you fuel your body after all the nutrients you lose in a high-intensity workout. Many people underestimate the amount of effort involved with swimming, so remember, just because you do not see sweat doesn’t mean it’s not there.

12

Stay active.

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The risk of a knee injury decreases with people that are constantly active and have healthy eating habits. If you have a healthy weight, there’s less weight that your knees have to handle during your everyday activities. Find the balance in your routine in order to achieve a stable weight and lifestyle.

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Remember to stop at any time you feel any sort of pain around your knee when doing any type of exercise. ^{[3]
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Zheni Stavre, MD
Board Certified Rheumatologist

Expert Interview}

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These all are ways to prevent injuries in your knee, so take them as an advice. There are more ways to protect your knees.

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How to Prevent Breaststroke Swimmer's Knee

Steps

Pay attention to your technique.

Warm up thoroughly before each swim practice.

Warm up your knees in the water.

Do some kicking drills during warm-up.

Communicate with your coach.

Respect your limits.

Cool down after your session.

Stretch after swimming.

Commit inside and outside the pool.

Strengthen the muscles that surround your knee.

Stay hydrated.

Stay active.

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