When we think about movement and exercise, our focus often goes straight to muscles like the glutes, quads, or core. However, there’s a lesser known yet immensely powerful player that underpins efficient, balanced movement: the diaphragm. As the primary muscle of respiration, the diaphragm does much more than help us breathe; it’s also instrumental in stabilizing our core, balancing muscle activation, and supporting proper joint alignment. Understanding the role of the diaphragm in movement can unlock pathways to better physical performance and reduce the risk of injury.
What Makes the Diaphragm So Important?
The diaphragm is a large, dome-shaped muscle located at the base of the ribcage, separating the thoracic cavity from the abdominal cavity. When we inhale, the diaphragm contracts, pulling downward to create space in the chest cavity, allowing the lungs to fill with air. But breathing is just one of the diaphragm’s essential functions. It also contributes to core stability, muscle relaxation, and joint alignment—all of which are crucial for efficient and balanced movement.
Let’s dive into how the diaphragm supports movement in three main ways: relaxing tonic muscles, activating phasic muscles, and assisting with proper joint centration.
1. Diaphragmatic Breathing Relaxes Tonic Muscles
Tonic muscles are those that tend to be active at low levels throughout the day to maintain posture and stability. Examples include the upper traps, the pectoralis minor, and the hip flexors. These muscles are prone to becoming overactive and tight, especially if we have poor posture, stress, or inefficient breathing patterns. Diaphragmatic breathing helps to counterbalance this tension.
When we engage in slow, deep diaphragmatic breathing, the parasympathetic nervous system—the part of the nervous system responsible for rest and relaxation—becomes more active. This activation has a calming effect on tonic muscles, allowing them to release and relax. It’s a bit like pressing a reset button, helping to counteract the effects of chronic stress and poor posture. By promoting relaxation, diaphragmatic breathing prevents tonic muscles from remaining in a state of constant tension, which can lead to muscle imbalances and restricted movement patterns.
2. Diaphragmatic Breathing Activates Phasic Muscles
Phasic muscles are responsible for generating movement. These muscles, such as the glutes, deltoids, and abdominals, are activated during specific activities, such as lifting, walking, or running. Unlike tonic muscles, phasic muscles should only engage when needed and should be allowed to relax when not in use.
Diaphragmatic breathing plays a role in activating phasic muscles by creating intra-abdominal pressure (IAP), which stabilizes the core and allows other muscles to engage efficiently. When we breathe deeply with the diaphragm, IAP is created, giving the phasic muscles a strong and stable base from which to work. This process aids in core stability and ensures that muscles like the glutes and deep abdominals are activated properly, supporting movement without overloading the low back or other parts of the body.
When phasic muscles are activated appropriately, they do the “heavy lifting” of movement, while the relaxed tonic muscles can provide necessary postural support. This balance between muscle groups contributes to better movement efficiency, as each muscle type is fulfilling its proper role.
3. Diaphragmatic Breathing and Proper Joint Centration
Joint centration refers to the optimal alignment of a joint, where it’s centered within the socket and balanced by equal muscle tension around it. Proper joint centration is crucial for efficient movement and injury prevention, as it reduces unnecessary strain on the joint structures.
Diaphragmatic breathing assists with joint centration by engaging the deep core muscles, including the transverse abdominis, pelvic floor, and multifidus muscles, which help stabilize and align the spine and pelvis. When the diaphragm contracts during inhalation, it works in concert with these deep muscles to create intra-abdominal pressure, stabilizing the trunk and aligning the joints in the hips, spine, and shoulders.
This core stability allows the body to maintain proper joint alignment during movement, preventing excessive wear on the joints. Without diaphragmatic support, the spine and other joints can become misaligned, increasing the risk of compensatory movements and injury. Joint centration facilitated by diaphragmatic breathing thus creates a foundation for fluid, balanced movement.
Practical Benefits of Training the Diaphragm
1. Improved Posture
Since the diaphragm plays a role in stabilizing the spine, breathing with the diaphragm helps promote better posture. This improved posture reduces tension in the neck, shoulders, and lower back, making it easier to maintain alignment during activities.
2. Increased Core Stability
Diaphragmatic breathing engages the core muscles in a way that supports functional stability. With a stable core, movements become more powerful and controlled, reducing the likelihood of injury during exercise or everyday activities.
3. Enhanced Flexibility and Range of Motion
Relaxed tonic muscles and engaged phasic muscles contribute to a better balance in flexibility and mobility. Diaphragmatic breathing allows tight muscles to release and facilitates a greater range of motion, improving performance and reducing injury risk.
4. Better Balance and Coordination
With the diaphragm’s role in stabilizing the core and centering joints, balance and coordination improve. The body becomes more responsive and resilient to changes in movement, making it easier to perform activities with precision and control.
The TLDR
The diaphragm is much more than a muscle for breathing—it’s a powerful stabilizer, a relaxation agent, and a key player in efficient movement. Diaphragmatic breathing activates the body’s innate balance between tonic and phasic muscles, encourages proper joint centration, and enhances posture and coordination. By focusing on diaphragmatic breathing, you’re setting the stage for a body that moves with ease, stability, and resilience. Whether you’re aiming for athletic performance or simply looking to move more comfortably in daily life, the diaphragm is the foundation of a balanced and efficient movement system.