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18/3/2026

Swimming as exercise – fitness, weight and health

Swimming as exercise is gentle, effective and suitable for most people – including those with overweight, osteoarthritis or after pregnancy. The buoyancy of water reduces the load on joints and the skeleton by up to 90%, making swimming a low-impact form of exercise that is very gentle on the body.

A woman floating on her back in a swimming pool

Swimming activates all muscle groups, including the legs, arms, shoulders, abdomen, and back, as swimmers use their entire body to propel themselves through the water. It strengthens the body's muscles gently, particularly the core and back muscles. Additionally, swimming develops flexibility by stretching the body and can improve posture by strengthening stabilizing muscles in the torso and spine.

Swimming can burn between 400 and 900 calories per hour, depending on intensity and stroke, and can assist with weight loss because it consumes more energy than other forms of training like running and cycling. Swimming is recommended for people of all ages and fitness levels and can be a social activity where you train together and set common goals. Being in the water makes it possible to disconnect from everyday distractions and focus inward, promoting mental clarity. It is important to maintain proper technique while swimming to maximize efficiency and reduce the risk of injury – correct technique is crucial for getting the best possible effect from your swim training. It is possible to vary your swim training by testing different strokes and distances to keep motivation high and improve cardiovascular fitness. It is beneficial to find your own pace and adapt the training to your needs, whether you choose to keep your head above water or maintain a specific technique to avoid injury.

Swimmers often practice taking powerful and effective strokes to move as efficiently as possible through the water; in freestyle (crawl), the leg kicks should come from the hip and not just the knees. It is wise to take swimming lessons to learn the correct technique, especially as a beginner, and it is possible to vary your swimming technique during each session to enhance your training. Furthermore, it is helpful to test different training methods and equipment to find what fits best. There are other things beyond just swimming, such as a sauna or relaxation areas, that can complement the training experience.

Swimming is perhaps a lesser-known but highly beneficial form of exercise for both body and mind. A typical swim workout can consist of a 15-minute warmup, 25 minutes for the main set, and a 5-minute cooldown. It is better to swim three times a week than once, but even five minutes in the water is valuable. If you want to get started with swimming as training, aim for at least two sessions per week, preferably 2x45 minutes. However, if you want to lose weight or build strong bones, you need to combine swimming with a good diet and strength training.

Introduction to Swimming as Training

One of the great advantages of swimming is that the water relieves pressure on joints and muscles, which reduces the risk of strain injuries. This makes swimming ideal for those who want to avoid the impact and stress that can occur with, for example, running or other high-intensity forms of exercise. At the same time, you can adjust the pace, duration, and intensity according to your own needs and goals. Whether you want to swim slowly for recovery or challenge yourself with intervals, there is always a way to make swimming your own.

Is Swimming Good Exercise?

Yes – swimming is one of the most versatile forms of training you can choose. You get both cardio and muscular endurance in the same session. Swimming activates all muscle groups, including legs, arms, shoulders, abdomen, and back.

Additionally, swimming is an excellent supplement to other training thanks to its gentleness on the joints and its ability to improve both strength and mobility.

When you swim, your heart and lungs work intensely to supply the body with oxygen-rich blood – it functions like strength training for the heart. Proper technique will make the workout more effective and reduce the risk of injury.

Benefits of Swimming as Training

Strengthens Heart and Vessels

Just like cycling and brisk walking, swimming is cardiovascular training that can:

  • Lower blood pressure
  • Improve blood lipids
  • Increase insulin sensitivity

Swimming can also improve posture by training and engaging stabilizing muscles in the core and back. Swimmers who train regularly use various strokes and techniques to find the most efficient way to move through the water. It is helpful to try varying your swimming technique during each workout to improve your training.

Gentle on the Joints

The water supports your body weight and relieves pressure on knees, hips, and feet. This makes swimming particularly suitable for:

  • Overweight
  • Knee osteoarthritis
  • Joint diseases
  • Pain during weight-bearing activity

Stress-Reducing Effect

The rhythmic movement in water is experienced by many as meditation in motion. It can lower stress levels and release endorphins that provide a sense of calm and well-being. Swimming also develops flexibility by stretching the body out in the water.

Swimming Technique and Equipment

To get the most out of your swim training, it is important to start with the right technique and equipment. There are several different strokes to choose from, such as freestyle, breaststroke, and backstroke, and each stroke has its own benefits and challenges. Freestyle is often the most effective stroke for cardio training, while breaststroke can be easier for beginners to learn. Backstroke is a good alternative if you want to vary your training and relieve pressure on the neck and shoulders.

Good swimming technique allows you to swim longer and more efficiently while reducing the risk of injury. It may be wise to take a few lessons or watch instructional videos to learn the correct technique from the start. Regarding equipment, there is also much that can facilitate your swim training. Goggles protect the eyes and provide better visibility underwater, while swim caps and fins can help you train technique and strength in different ways. Choosing the right equipment and spending time developing your technique is important for making swimming both fun and effective.

Can Swimming Be Your Only Form of Exercise?

If the alternative is not exercising at all – then swimming is a massive health gain. The greatest improvement happens when we go from nothing to something. It may be possible to supplement swimming with other activities to get a more complete workout and variety. Swimming can also burn between 400 and 900 calories per hour, depending on intensity and style.

However, there is one important aspect: the skeleton.

Because water reduces the impact of gravity, the skeleton does not get the loading required to strengthen bones and counteract osteoporosis. Therefore, it is recommended that you supplement with:

  • Strength training 2–3 times per week
  • Weight-bearing activity such as walking or light jogging

This is especially important if you are losing weight, as you want to preserve muscle mass and metabolic rate. It is better to swim three times a week than once, but even five minutes in the water is valuable. If you want to get started with swimming as training, aim for at least two sessions per week, preferably 2x45 minutes.

Swimming to Lose Weight – Does It Work?

Swimming uses the whole body and activates many muscle groups simultaneously, which means the workout consumes a lot of energy. Therefore swimming burns energy and improves health, but physical activity in itself often has a limited direct effect on weight loss.

To lose weight, a calorie deficit is required – meaning you take in less energy than the body expends. Swimming can help with weight loss because the training will consume more energy than other forms of exercise like running and cycling.

One challenge is that exercise can increase hunger, which can lead to unconsciously eating back the calories just burned.

However, regular swim training is very valuable for:

  • Reducing the risk of weight gain
  • Preserving muscle mass
  • Strengthening the metabolism
  • Increasing energy levels

Swimming is therefore not the entire solution for weight loss – but it is a powerful piece of the puzzle.

Swimming After Pregnancy

After childbirth, the body needs to recover at a gentle pace. Swimming is a soft alternative that:

  • Does not strain a weakened pelvic floor
  • Is mild on abdominal muscle separation (diastasis recti)
  • Helps you get started without high impact

Thanks to the water's buoyancy, the load on joints is reduced, making swimming a low-intensity form of exercise that is possible to maintain even after pregnancy. Swimming can also help strengthen muscles in both the core and back, while you can focus on maintaining correct technique to avoid injury and make the workout as effective as possible.

Losing Weight and Breastfeeding

During breastfeeding, the body's energy needs are elevated. Restrictive diets such as strict low-carb, VLED (Very Low Energy Diet), or heavy fasting are not recommended during this period.

Instead, focus on:

  • Nutrient-dense food
  • Sufficient protein
  • Whole grains and vegetables
  • Regular, gentle movement like swimming and walking

It can be beneficial to try varying your swimming with different strokes and distances to keep motivation up and improve fitness. There are also other things besides just swimming that can complement training during breastfeeding, such as walks or other low-impact activities.

Weight loss during breastfeeding should occur slowly and sustainably.

Safety and Injuries

Even though swimming is a gentle and safe form of exercise, there are still some things you should consider to avoid injuries and accidents. It is always good to swim with someone else or in a group, especially if you are unaccustomed to being in the water. If there are lifeguards or trained staff on site, safety increases further.

Before jumping into the water, it is important to warm up the body properly, for example, with some simple movements for the shoulders and arms. Listen to your body during the swim and take breaks if you feel tired or experience pain. Common swimming injuries include overuse of the shoulders and rotator cuffs, as well as muscle strains. If you experience pain or discomfort, it is important to take it seriously and seek medical help if necessary. By being aware of the risks and taking preventive measures, you can enjoy swimming as a safe and healthy form of exercise for the whole body.

Summary – Is Swimming Right for You?

Swimming as training is an excellent choice for:

  • Cardiovascular health
  • Joint health
  • Stress management
  • A gentle return to movement

Additionally, swimming can be a social activity where you will be able to train together with others and perhaps find new training partners. It is possible to adapt swimming to your own goals and needs, allowing you to get as much as possible out of your workout. Swimming might be the form of exercise that suits you best if you are looking for gentle and effective full-body training.

If you want to optimize your health and weight over time, you should combine swimming with strength training and a balanced diet.

Article reviewed by: 
March 17, 2026
Article reviewed by: 
Last reviewed:
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March 17, 2026

April 16, 2026

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