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Isotonic contraction Muscle engagement
where the muscle changes length; can
either be eccentric or concentric.
Kinesiology Study of body movement.
Kumbhaka Pranayama practice of
breath retention.
Kyphosis Convex curves of the spine,
found naturally in the thoracic spine and
sacrum; the term can also describe an
excessive amount of this convex curve,
as in a dowager’s hump.
Ligament Connects bone to bone; made
of dense regular connective tissue proper,
which has parallel collagen bers.
Lordosis Concave curves of the spine,
found naturally in the lumbar and cervical
spine; the term can also describe an
excessive amount of this concave curve.
Lumbar spine Five vertebrae of the low back.
Lymph Fluid lled with white blood cells
to ght invaders; collected from interstitial
uid, it drains back into the heart after
being ltered in lymph nodes.
Meditation Concentration or mental focus
exercise; includes mindfulness, mantra,
loving-kindness, transcendental meditation
(TM), and others; Dhyana, in Sanskrit.
Meta-analysis Systematic assessment
of previous research in a specic area to
derive broad conclusions; the gold
standard of review articles.
Mindfulness Paying attention on purpose to
the present moment, without judgment (as
dened by researcher Jon Kabat Zinn, PhD).
Muscle tissue Contractile tissue; the
three types are skeletal, smooth, and
cardiac muscle.
Nadis According to Indian medicine and
Hindu philosophy, these are channels for
prana to ow.
Nerve Bundle of axons of neurons in the
peripheral nervous system; conductive
tissue that acts like wires through the body,
carrying signals to and from the central
nervous system. Includes cranial nerves
and spinal nerves; a bundle of axons in the
central nervous system is called a tract.
Nervous tissue Conductive tissue made
of neurons and helper cells.
Neuron Nerve cell; carries electrical signals.
Neuroplasticity Ability of the brain to
create neural connections.
Neutral spine Position of optimal load
distribution for the spine; maintains the
natural curves of the cervical (lordosis),
thoracic (kyphosis), and lumbar (lordosis)
segments of the spine.
Neutral pelvis Position of the pelvis that
best supports the inward curve of the
lumbar spine. No excessive anterior or
posterior pelvic tilt; hip points are in line
with each other; minimized stress on
ligaments, muscles, and other tissues.
Osteoporosis Condition where bones
become weak and brittle, leaving them at
higher risk for fractures.
Parasympathetic nervous system (PSNS)
“Rest and digest” branch of the autonomic
nervous system; the relaxation response.
Peripheral nervous system (PNS)
Includes the cranial and spinal nerves.
Physiology The study of the function of
parts and systems in the body; the study
of how the body works.
Postural hypotension Also called
orthostatic hypotension; a sudden onset of
low blood pressure caused by standing up
too quickly from the oor or an inversion.
Prana Sanskrit word meaning life-force
energy, vital energy, or breath, similar to the
Chinese concept of qi; yogis believe you can
consciously transform and move your prana.
Pranayama Sanskrit word meaning breath
extension or control; breathwork.
Proprioception Type of interoception that
focuses on spatial body awareness,
particularly while in motion.
Randomized controlled trial (RCT)
Randomization of the experimental group
and control(s), which can lead to less bias;
gold standard of research trials.
Sacroiliac joint Joint between the sacrum
and ilium of the pelvis; allows a small
amount of movement.
Samskaras According to Indian philosophy,
these are imprints or impressions of our
past actions.
Sanskrit The ancient Indian language in
which many yoga texts were written.
Stretching When muscle bers lengthen,
often beyond resting length.
Sun salutation Series of asanas done in
owing sequence to warm up the body
and focus the mind.
Supercial Closer to the surface; for
instance, your skin is supercial to
your muscles.
Supine Lying on your back, face up.
Sympathetic nervous system (SNS)
“Fight or ight” branch of the autonomic
nervous system; the stress response.
Synovial joint Most common and most
mobile type of joint in the body, such as
the shoulders, hips, and knees.
Tendon Connects muscle to bone; made
of dense regular connective tissue proper,
which has parallel collagen bers.
Thoracic spine The 12 vertebrae of the
mid-back region.
Tissues Collection of cells that come
together for a similar function; the four
primary tissue types are epithelial,
connective, muscle, and nervous.
Vagus nerve Tenth cranial nerve (CN X),
important in parasympathetic control of
the heart, lungs, and digestive organs.
Vayus According to yoga philosophy, your
prana ows in specic patterns called the
vayus: Prana (in), Udana (into head), Vyana
(into limbs), Samana (around), and Apana
vayu (down and out).
Yoga therapy According to the International
Association of Yoga Therapists, “Yoga therapy
is the process of empowering individuals
to progress toward improved health and
well-being through the application of the
teachings and practices of Yoga;” this
developing eld has educational standards
that exceed those for general yoga
instruction, and prepares practitioners to
work safely with health conditions.
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