Introduction to Swimming Fitness | The Best Effects of Full-Body Swimming and How to Get Started

Even if you think you're not good at swimming or can't swim, the world of underwater fitness starting with water walking and aquabics is wide open to you. Swimming is one of the ideal exercises for fitness, characterized by being "gentle on joints," "using your whole body," "high calorie burning," and "improving cardiovascular function." This time, we will comprehensively explain the effects of swimming and aquatic exercise through how to get started.

Health Benefits of Swimming: Why Swimming is the Ultimate Aerobic Exercise

In water, buoyancy eliminates about 90% of body weight, making the impact on joints (knees, lower back, ankles) nearly zero. This means that people with obesity, arthritis, lower back pain, or knee injuries can exercise safely.

**High calorie consumption** is another major attraction of swimming. 60 minutes of swimming (freestyle, moderate pace) burns approximately 400-600 kcal. This is comparable to walking for the same duration (250-350 kcal) or light jogging (350-500 kcal), and because you're exercising against water resistance, you burn more energy with the same movements.

**Effects on cardiovascular function** are also significant. Swimming is an aerobic exercise performed with restricted breathing, so respiratory muscles such as the diaphragm and intercostal muscles are strengthened. Multiple studies show that swimming is effective in improving asthma symptoms.

**Using all body muscles** is another characteristic. Freestyle primarily uses the muscles of the shoulders, upper arms, back, core, and legs, while breaststroke emphasizes the chest muscles and inner thighs. Backstroke is effective for the core, back muscles, and shoulder stabilizer muscles.

Effects and Characteristics by Swimming Style

**Freestyle** is the fastest swimming stroke with the highest calorie consumption. It primarily uses the muscles of the shoulders, upper arms, and back, while also requiring core stability. With proper form, you can swim long distances efficiently.

**Breaststroke** is the slowest stroke with the easiest breathing, making it beginner-friendly. It's particularly effective for the chest muscles, hamstrings, and inner thighs. Since you can maintain a comfortable pace without strain, it's ideal for long-duration aerobic exercise.

**Backstroke** is performed on your back, so your face stays out of the water and breathing is always secure. It particularly strengthens your core and back muscles, and is effective for improving posture that tends to become hunched in daily life.

**Butterfly** has the highest calorie consumption of all strokes and particularly requires core and upper body strength. While it's difficult to master, it's worth challenging once you've built up basic fitness.

For Those Who Struggle with Swimming: Water Walking and Aquabics

For those not confident in their swimming ability, water walking and aquabics are recommended.

**Water Walking**: Simply walking in chest-deep water provides 1.5 to 2 times the exercise effect of walking on land due to water resistance. With minimal stress on the knees and lower back, it's also ideal for elderly people and those in rehabilitation.

**Aquabics**: Group exercise performed rhythmically in water. Many sports clubs offer classes, and you can enjoy them safely under instructor guidance. Because you move to music, it has more of the fun of dancing than traditional fitness.

Choosing a Pool and Beginner Training Menu

**Types of Pools**: There are three main types: public municipal pools, sports club pools, and heated pools. Public pools are affordable (around 300-500 yen per visit) but lane restrictions are loose and can get crowded. Sports clubs require monthly membership fees but offer comprehensive services including group classes and private lessons.

**Sample Beginner Training Menu (45-60 minutes)**: - Warm-up: Water walking 5-10 minutes - Flutter kick practice (holding the wall): 100m × 3 sets - Freestyle or breaststroke: Swim 100m then rest 50m for 5-8 sets - Cool down: Slow breaststroke for 200m

With consistent practice 2-3 times per week, your form will stabilize in 1-2 months, and within 3-6 months you'll notice improvements in fitness and swimming ability. With continued effort, you can definitely overcome any hesitation about swimming.

Tips for Making Swimming a Habit

The key to continuing swimming is to prioritize "enjoyment." Don't focus too much on distance or times; at first, simply consider "coming today" a success. Making friends to train with, participating in group classes, and keeping a swimming journal can all help with consistency. Water puts everyone on equal footing—that sense of freedom might just be the best reason to keep swimming.