Pilates has long been regarded in fitness and rehabilitation
as a great method for core strengthening. Practitioners and teachers of Pilates
alike use or are familiar with the term "powerhouse," which is
analogous to the contemporary term in fitness and Pilates, "core."
Interestingly, Joseph
Pilates never uses the term "powerhouse" in his writings, and in
fact, only refers to the trunk once. However, he writes frequently about
breathing and the spine. For example, he says, "Above all, learn to
breathe correctly" and "If your spine is inflexibly stiff at 30, you
are old; if it is completely flexible at 60, you are young."
With this balance of
breathing, spinal mobility and muscle control, Pilates is a perfect example of
moving the body in an optimal way--from a dynamic
core.
Often the next word
that comes to mind with core is "stability." My desire to move away
from the term "core stability" is reflected in my choice of a name
for this blog and for my core training system, Dynamicore. "Core
stability" connotes the idea that the core is static. One definition of stability is "the
quality or state of something that is not easily changed or likely to
change; the quality or state of something that is not easily moved."
That's not what Joseph Pilates taught, nor is it what we know to be optimal for
functional movement.
As a Pilates teacher
who has studied Joseph Pilates' original writing and various Pilates schools, I
offer this: Mr. Pilates
had this right all along. With his emphasis on breathing, posture, motor
control, whole body movement, and spinal mobility, he was years ahead of
physical education and fitness of his time. In fact, current research is
circling back to these very concepts as parts of programs to prevent and treat such a wide variety of conditions as back pain, pelvic pain, hip dysfunction, incontinence, diastasis recti,
and even shoulder dysfunction.
This is the basis for Dynamicore--the philosophy and basis of Pilates combined with contemporary research on the core into a movement system. This system can be used by Pilates teachers, physical therapists, yoga teachers, personal trainers, or any other movement expert to help their clients or patients breathe and move better. Dynamicore provides a knowledge base, systematic assessment, and training of the core for optimal movement strategies, whether practicing Pilates, yoga, weight training, or rehabilitation as the main activity. It is a complement to these other disciplines.
What is the core?
The term "core" can
mean different things to different people. Here, and in most Pilates schools,
the core refers to a group muscles that research has shown, when functioning
optimally, engage before movement occurs in the extremities. Your brain
knows to fire these muscles before anything moves.
The Anticipatory Core
The muscles of the pelvic floor,
transversus abdominis, diaphragm, and multifidi make up the anticipatory core. These muscles are
key stabilizing* forces for joints in the trunk and pelvis. The core muscles
are tonic muscles, meaning they are postural muscles that are working
continuously. They do not need to be strong; they merely need to be trained to
be functional.
Some fitness professionals and
other experts refer to additional muscles as part of the core--for example, the
internal and external obliques and the rectus abdominis. For clarification, when I use the general
term “core”, I refer to the deeper postural muscles as a group also referred to as
the anticipatory core.
When the core has become
dysfunctional, retraining happens with conscious breathing, identification of
the individual parts of the core, coordination of the core muscles, and
finally, integrating movement patterns with breathing and core engagement.
As Joseph Pilates says, one works on movements until
they are "correctly executed and mastered to the point of subconscious
reaction." This “unconscious
competence” is the goal in learning a new skill, and it is particularly
important for the anticipatory core muscles, which need to fire before movement
occurs, and should be unconsciously working all the time.
Correct breathing is the first step to having a functional core. The major muscle of respiration is the diaphragm, so that is the first key player that sets into motion the other players of the core team. With the inhalation, the diaphragm
descends, allowing air to fill the lungs, and sending the abdominal organs
downward. The pelvic floor receives the abdominal and pelvic organs by
eccentrically loading. On the exhalation, the pelvic floor rebounds, the
diaphragm ascends back up into the ribcage, and the abdominal and pelvic organs
return up and in. The transversus abdominis (TvA) facilitates the exhalation by
narrowing the diameter of the abdominal canister, and by doing so, tenses the
thoracolumbar fascia. The multifidi, now squeezed by the fascia, contract to
segmentally stabilize* the spine.
Julie Wiebe refers to the cranio-caudal movement mechanism
of the diaphragm and pelvic floor as the "Piston." She says that the "gears" of the
core team need to work together, starting with the breath and diaphragm/pelvic
floor piston. Isolation of specific core muscles, particularly an over-emphasis
on the TvA in rehabilitation of back pain or core strengthening programs, or kegels
for pelvic floor muscle strengthening, is not an optimal approach.
Reminding us that we cannot strengthen a muscle that our brains cannot activate, Diane Lee stresses for many people these deep core
muscles need to be activated first through imagery and intention--connecting
the mind and body in order to activate muscles that may lie dormant.
Where some Pilates teachers have deviated from Pilates' original teachings in this regard, most likely due to the fitness and rehab worlds' enthusiasm for the TvA, is in an over-emphasis on this deep abdominal muscle. Some teachers have learned that the abs must "draw in" at all times. This practice can lead to excessive intra-abdominal pressure, bracing, gripping, or over-recruitment of the abdominal muscles. We know these now to be a non-optimal strategies for the core. Research indicates that anticipatory postural adjustments (contraction of the diaphragm, TA, and pelvic floor) involve movements and not rigidification ("stability," not easily moved) of the trunk.
Postural habits, breathing patterns, movement patterns, and injury can all cause the anticipatory core not to function optimally. We know that the multifidi cease to function after an acute injury, the pelvic floor muscles can become dysfunctional, and the transversus abdominis can be overpowered in excessive abdominal workouts or non-optimal movement strategies. The diaphragm, while known mostly for its respiratory function, is also a postural muscle; however, as respiratory demands increase, the diaphragm shifts its function to respiration. In other words, breathing wins. Therefore, if you are breathing in a way that causes your diaphragm to stop working optimally, the function of the diaphragm is likely to shift to just breathing, rather than contributing to postural support. Injury can also cause alterations in breathing patterns.
Moving with a flowing breath pattern and in optimal
postural alignment, as Joseph Pilates teaches, is enough to ensure the
anticipatory core is working. The Pilates Method philosophy combined with contemporary research on the core form an ideal system to train an optimal core strategy, Dynamicore.
*I used the term "stabilize" here. Stability is what joints need, in this case vertebral joints, when placed under load. There needs to be a balance between stability and mobility in all joints--it's when there is too much or too little of one that results in faulty biomechanics and eventually injury. This idea is part of what I refer to as an "optimal movement strategy."
Resources:
Resources:
- Julie Weibe, Physical Therapist: https://www.juliewiebept.com/
- Diane Lee, Physical Therapist: http://dianelee.ca/article-core-training-versus-strengthening.php
- Leon Chaitow, Osteopathic Physician and Naturopathic Doctor, published author on breathing http://leonchaitow.com/2013/05/02/four-exercises-for-better-breathing/
- Paul Hodges, Physical Therapist and researcher on the core: http://www.bettermovement.org/2012/review-of-paul-hodges-talk-on-motor-control-part-one/
- Joseph Pilates, Return to Life: http://www.amazon.com/Return-Life-Joseph-H-Pilates/dp/0976823209