Maximus Gage
Swimming is a full-body workout that engages nearly all of your muscle groups. However, the muscles used in swimming are somewhat dependent on the swimming stroke. For example, the butterfly stroke requires the fullest whole-body muscle engagement, whereas the breaststroke requires the most output from the legs. The main upper and lower body muscles unite all four strokes to generate propulsion and ensure balance and stability in the water. Shoulder muscles are constantly activated in every swimming stroke, which is why swimmers are known for their broad shoulders. Additionally, a strong core is essential for keeping your body straight and high up in the water.
| Characteristics | Values |
|---|---|
| Shoulder muscles | deltoids, rotator cuff muscles |
| Back muscles | latissimus dorsi, trapezius, rhomboids, erector spinae |
| Chest muscles | pectoralis major, pectoralis minor, serratus anterior |
| Arm muscles | biceps, triceps, thenars (hand muscle), brachioradialis (forearm flex muscle), flexor digitorum profundus (forearm extend muscle) |
| Core muscles | obliques, abs, gluteus maximus, gluteus medius, rectus abdominus |
| Leg muscles | quadriceps, hamstrings, calves, tibialis anterior (shin muscle), flexor digitorum brevis (foot muscle), gastrocnemius, soleus, tibialis posterior |
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What You'll Learn
Shoulder muscles
Swimming is a full-body workout, but the shoulder muscles stand out as the most important for swimming. Every motion of every type of swimming stroke rotates around the shoulders, making them the essential pivot that enables a strong swim.
The shoulder is a complex joint where bones, muscles, and connective tissue (tendons and ligaments) come together to let you move your arms. Shoulder muscles are constantly activated in every swimming stroke and endure the most stress from swimming. This is why swimmers are known for their broad shoulders.
Shoulder mobility and stability are essential for swimmers. Mobility refers to the ability to move through an optimal range of motion, while stability is the ability to produce and absorb force through a joint. A key defence against shoulder injuries is perfecting your technique.
There are several exercises to improve shoulder mobility and stability. One such exercise is the T-spine mobility + double tennis ball exercise. This involves lying on your back and placing two tennis balls at the bottom of your spine where your ribs connect. You then perform a quarter sit-up movement a few times and then slide the balls up one vertebra. You continue this process until you reach where your shoulder meets your spine.
Another exercise is the seated wall angel knees bent. This involves sitting on the floor with your back upright against a wall. You place your forearms and elbows against the wall and squeeze your shoulder blades together. While holding them tight, you move your arms up and down the wall for as long as you can maintain contact with the wall using your elbows.
It is important to be careful not to overdo it with shoulder exercises as the shoulders are a common area for injury.
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Core muscles
The abdominal muscles, obliques, and gluteus maximus and medius are all part of the core and are responsible for maintaining proper body position in the water. A weak core can lead to poor stroke technique and injuries, as it is more difficult to keep the body straight, resulting in increased drag.
Core training is now considered an essential part of a swimmer's preparation, with many elite swimmers and coaches advocating for its importance. Swimmers can incorporate specific exercises into their training regimens to strengthen their core muscles, such as side V-ups, which target the lower back, hip flexors, and inner abdominal muscles.
Additionally, a strong core can help to reduce stress on joints and other muscles, such as the shoulders, which are particularly vulnerable to injury in swimmers. This can help swimmers avoid common issues like "swimmer's shoulder."
Research has shown that specialized core muscle training can improve performance in national-level swimmers, reducing start-up time and improving speed and technique over a 50-meter front crawl swim. Thus, core strength is a crucial element for swimmers seeking to improve their performance and efficiency in the water.
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Leg muscles
Swimming is a full-body workout, but the legs play a crucial role in providing additional power and speed. The leg muscles used in swimming include the hamstrings, quadriceps, hip flexors, gluteus maximus, calves, and foot muscles.
Breaststrokers, in particular, rely on strong leg muscles, with their legs displaying wonderful definition as their arms try to keep up. When performing the breaststroke, the "'in-sweep'" is done by the bicep, while the "'up-kick'" is done by the hamstring.
To improve your leg strength for swimming, dryland training is beneficial. This includes exercises such as squats, lunges, and using a kickboard or fins to increase resistance in the water. By strengthening your legs, you will be able to generate more powerful push-offs and improve your speed and endurance.
Additionally, improving your ankle mobility will give you a more propulsive kick. Range of motion is critical for effective lower-body performance, so incorporating exercises that target this aspect, such as ankle stretches and the bridge march, can enhance your swimming performance.
Overall, targeting these leg muscles and incorporating specific exercises into your training regimen will help you develop the power and speed needed to excel in swimming.
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Arm muscles
Swimming is a full-body workout, but different strokes will target different muscle groups to varying degrees. Almost every stroke uses arm muscles, such as the biceps and triceps. The butterfly stroke, in particular, requires the most arm muscle engagement per stroke cycle. The biceps are also used during the backstroke and freestyle strokes.
The deltoids and rotator cuff muscles in the shoulders help rotate and lift the arms in and out of the water, helping to angle the hands in the proper position to function like paddles. The deltoids and shoulders also help the hands have proper entry in the water and to reach out far. Shoulder muscles are constantly activated in every swimming stroke, enduring the most stress, so it's important to train them carefully.
Forearm muscles are also worked when pulling in the water for more propulsion. The thenars (hand muscle), brachioradialis (forearm flex muscle), and flexor digitorum profundus (forearm extend muscle) are all used during swimming.
To focus on training your arm muscles, you can use paddles and pull buoys, which allow your lower body to rest while your arms, back, shoulders, and core put in the work.
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Back muscles
Swimming is considered a full-body workout, but different strokes engage different muscle groups. The back muscles, in particular, play a crucial role in stabilising the shoulders and ensuring balance and propulsion during swimming.
One of the most important back muscles for swimming is the latissimus dorsi, often referred to as the "lats". This muscle is responsible for propulsion and balance in strokes like the butterfly, front crawl, and backstroke. The stronger your latissimus dorsi, the greater your distance per stroke. During a backstroke sprint, flexing the lats shifts you into a higher position in the water, allowing for a short burst of speed.
The trapezius muscle, located in the upper back and neck, is another key player in swimming. Along with the lats, it helps increase stroke rate and body position during a sprint cycle. However, prolonged flexing of the neck and back can hinder rotation, so these muscles are most effective during short bursts of speed.
While not technically a back muscle, the shoulder muscles are closely connected to the back and play a pivotal role in swimming. Every motion of every swimming stroke rotates around the shoulders, making them essential for a strong swim. The deltoids, in particular, are part of the shoulder muscle group and are activated in various strokes.
Additionally, the core muscles, including the abs, obliques, and lower back, work in tandem with the back muscles to provide stability, rotation, and breathing control. A strong core helps prevent sagging and dragging in the water, reducing resistance and enabling smoother strokes.
Overall, the back muscles, along with the core and shoulder muscles, form a powerful unit that contributes significantly to a swimmer's performance and efficiency in the water.
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Frequently asked questions
Swimming is considered a full-body workout, but different strokes will target different muscle groups. For example, the butterfly stroke uses arm muscles such as the biceps and triceps, as well as the abdominal muscles and lower back muscles in the core. The breaststroke, on the other hand, requires more output from the legs, with muscles such as the quadriceps, hamstrings, and gluteus maximus propelling you through the water.
To target your quadriceps, hamstrings, and other leg muscles, use a kickboard and get in a few laps of kicking with your legs. To focus on your upper body, use paddles and a pull buoy to let your lower body rest while your back, shoulder, core, and arm muscles work. You can also add resistance equipment such as a parachute or drag socks to make your muscles work harder.
Swimming is a low-impact sport that provides natural resistance training due to the density of the water. This helps to improve muscle endurance and strength, as well as cardiovascular fitness. The constant repetition of strokes increases muscle endurance, and the density of the water tones the muscles.
Swimmers often struggle with deltoid and shoulder muscle injuries due to the constant activation and stress placed on these muscles during swimming strokes. Additionally, the shoulder muscles are essential for rotating the arms and lifting them in and out of the water, so overdoing certain exercises can lead to an injury commonly known as "Swimmer's Shoulder".
