Lesson 16: Functional Movement and Resistance Training Flashcards
What is joint stability defined as?
The ability to maintain or control joint movement or position.
How is joint stability achieved?
Through the synergistic actions of the joint’s components aka muscles, ligaments, joint capsules and the neuromuscular systems.
What is joint mobility defined as?
The range of uninhibited movement around a joint or body segment.
How is joint mobility achieved?
Through the synergistic actions of the components of the joint and neuromuscular system.
Movement efficiency involves a synergistic approach between stability and mobility, how does this work?
proximal stability promotes distal mobility
Does the glenohumeral joint promote mobility or stability?
mobility
Does the scapulathoracic region promote mobility or stability?
Stability
Does the thoracic spine promote mobility or stability?
Mobility
Does the lumbar spine promote mobility or stability?
Stability
Does the hip promote mobility or stability?
Mobility
Does the knee promote mobility or stability?
Stability
Does the ankle promote mobility or stability?
Mobility
Does the foot promote mobility or stability?
Stability
What will occur when mobility is compromised?
The joint will seek to achieve full ROM by involving movement into another plane and/or certain stable joints may look to compromise stability in order to reach the desired level of mobility.
If the hip flexors lack flexibility in a bird dog movement, what is likely to occur due to compromised mobility?
The extended leg and hip will likely rotate in to the transverse plane.
If a client with kyphosis tries to extend the thoracic spine, what is likely to occur as a result of compensation for the lack of thoracic mobility?
An increase in lumbar lordosis
True or false, muscle imbalances do not alter the physiological and neurological properties of muscles?
False
True or false, muscle imbalance contributes to dysfunctional movement?
True
How do technological advancements such as exercise machines raise a potential concern for mobility and stability training?
Often, individuals with limited stability/mobility will use the machines for compensated movement, yet, this does not fix the original issue.
What are the 6 stages of dysfunctional movement?
- Muscle imbalance
- The muscle imbalance alters physiological and neurological properties
- The mobility-stability relationship is compromised
- The body learns to achieve the desired movement with least resistance
- Dysfunctional movement occurs
- There is an inevitable breakdown of the body
Why does periods of inactivity (ie sedentary) lead to muscle imbalances and therefore physiological and neurological property issues?
During periods of inactivity, joints are held in shortened position causing certain muscles to shorten and their antagonist muscles to lengthen.
What is the length-tension relationship between?
The length-tension relationship is between the contractile proteins of a sarcomere and their force generating capacity.
What are two examples of contractile proteins?
Actin, myosin
What does a slight stretch of the sarcomere beyond its normal resting length result in?
This increases the spatial arrangement between the muscle’s contractile proteins and increases the force generating capacity - AKA this is length-tension relationship.
What would reduce the muscle’s force-generating potential?
Stretching the sarcomere beyond optimal range and beyond that of the length-tension relationship. Also shortening the sarcomere beyond resting length.
When sarcomere is at its resting length, it is at around 80% of muscle tension, what happens to the % of muscle tension when it shortens and overly lengthens?
When it shortens, the % of muscle tension severely decreases and vice versa.
What contributes to shortening of muscles? (4)
Muscle immobilzation, passive shortening, trauma and aging
How many sarcomeres will a typical muscle myofibril have?
500,000 sarcomeres arranged in series.
What happens to the muscles on the opposing side of the lengthened muscles?
They adapt and add sarcomeres in series to shift the length tension curve. They generate more force when lengthened but reduced force when shortened or at normal resting length.
How would you restore the normal resting length in a muscle that is currently overly lengthened or shortened?
This requires a physiological adaptation and strengthening in the normal-resting-length position as opposed to lengthened position.
What is a force-couple relationship?
The definition of muscles working together to provide opposing, directional or contralateral pulls at joints.
What is joint movement dependent on?
Nerve activity
What is done (to some degree) to help stabilize and control movement within a joint movement?
Simultaneous co-contraction of the antagonist muscle.
What is increased within the muscle and subsequently implied when a muscle becomes shortened?
Tonicity is increased within the muscle and this implies that the muscle requires a smaller or weaker nerve impulse for contraction.
If a muscle is shortened, and the client tries to activate the antagonist muscle at a joint - what will the agonist do?
The agonist will have a reduced irritability threshold meaning it will require weaker nerve impulses to contract. Therefore, the agonist will prematurely activate and inhibit the antagonist’s contraction.
What is a hypertonic muscle?
Simply, a tight muscle. It has too much tone/tension.
Hypertonic muscles decrease the neural drive to the opposing muscle, what is this via?
Reciprocal Inhibition
What is reciprocal inhibition?
Reciprocal Inhibition is the process of the antagonist/opposing muscle relaxing to allow contraction of the agonist on the other side of the joint.
What is an example of reciprocal inhibition in a bicep curl?
To contract your elbow flexors (biceps) your elbow extensors (triceps) must be inhibted.
What is synergistic dominance?
When the body has to use other muscles at the joint to become the prime mover due to other muscles (at the joint) being weak/shortened.
Phase 1 of Resistance Training first focuses on stabilization of the lumbar spine/region. What is the next focus point?
When the lumbar spine region appears to be stabilized and core function is of an adequate level, you move to the hips and thoracic spine which are adjacent to the lumbar spine.
After stabilizing the lumbar region and hips/thoracic spine, what is the next focus point?
The next focus is the scapulthoracic region.
After stabilizing and increasing mobility of the lumbo-pelvic, thoracic and shoulder regions - what is the next focus for the Resistance Training programme?
Enhancing stability and mobility of the distal extremities.
Why is it important to develop stability before trying to improve mobility?
Because focusing on mobility may compromise existing stability within the segment due to muscles needing to alter their functions to assist in providing stability.
What type of fibers do muscles that act primarily as stabilizers contain more concentrations of?
Type 1 muscle fibers / slow-twitch
What type of fibers do muscles that act primarily for joint movement and force-generation contain greater concentrations of?
Type 2 muscle fibers / fast-twitch
What type of muscle fibers are better suited for strength and power type training?
Fast-twitch / type 2
If a client demonstrates a lack of trunk stability during a hurdle step test, what will this show?
That they have low core function.
If a client exhibits an anterior pelvic tilt during a static postural assessment, what muscles are tight and what needs to be addressed?
The hip flexors are tight and the trainer needs to address a lack of hip flexor mobility.
Phase 1 will consider all types of stretching, what are these? (5)
myofascial release static stretch proprioceptive neuromuscular facilitation dynamic stretch ballistic stretch
What type of stretching would be recommended for a deconditioned client with poor flexibility and muscle imbalance pre-workout, during, post-workout?
Pre: Myofascial release before warm up and static stretching post-workout.
During: Dynamic
Post: Myofascial Release, Proprioceptive Neuromuscular Facilitation, Static
What type of stretching would be recommended for a conditioned client with good flexibility and muscle balance pre-workout, during, post-workout?
Pre: Myofascial release and dynamic stretches.
During: Dynamic
Post: Myofascial Release, Proprioceptive Neuromuscular Facilitation, Static
What type of stretching would be recommended for a performance athlete with good flexibility and muscle balance pre-workout, during, post-workout?
Pre: Dynamic stretching and ballistic stretching.
During: Dynamic
Post: Myofascial release, Proprioceptive Neuromuscular Facilitation & Static
What does Self-Myofascial Release theoretically reset and reduce?
It is though to reset the proprioceptive mechanisms of soft tissue and reduce hypertonicity (tightness) within the muscles and fascia - thereby increasing ROM.
What does Autogenic Inhibition state that activation of Golgi-tendon organ inhibits?
Muscle spindle response
When a contraction or active stretch movement in an agonist is performed for over 6 seconds, what happens to the antagonist?
The antagonist muscle becomes inhibited and allows it to be stretched.
What should the strengthening of muscles to improve posture initially focus on?
Placing the client in positions of good posture and beginning low-grade isometric contractions of 2-4 reps and 5-10 seconds.
Why is it better to gradually increase exercise volume to improve strength and endurance when focusing on improving posture?
Because higher intensities and a requirement of greater forces will evoke faulty recruitment patterns and may overload the muscles.
What is an example of an exercise that a client should perform to help strengthen their posterior deltoids and rhomboids that are associated with forward-rounded shoulders?
Reverse flys in a supine position, they should isometrically press the back of arms into the floor.
Activation of the core muscles produces a ‘hoop tension’ effect, what does this do?
Increased intraabdominal pressure which creates a lift pressure against the diaphragm, increases traction between the lumbar vertebrae and reduces joint/disc compression in the lumbar discs by creating a rigid cylinder to stabilize the spine against loading forces.
What is recommended that the activating core phase should begin focusing on?
It should begin by focusing on stability within the lumbar spine, particularly exercises that emphasize Transverse Abdominis Activation and re-education of faulty motor patterns.
Why might obese clients find it uncomfortable to lie on their backs or assume an all-fours position?
Due to the extra girth around their abdomen.
When should clients implement bracing of the core?
During movements with external loading forces
What should stage 1: core function of activating the core emphasize?
It should emphasize core activation exercises and isolated stabilization under minimal spinal loading
What should stage 2: static balance of activating the core emphasize?
It should emphasize seated and standing stabilization over a fixed base of support.
What should stage 3: dynamic balance of activating the core emphasize?
It should emphasize whole-body stabilization over a dynamic base of support.
How should a client perform a Supine Drawing-In (centering)?
They should assume a supine, bent-knee position and align knees + second toe with anterior superior iliac spine. Hands are in line with belly button on sides, contract and activate core muscles for 1-2 sets, 10 reps with a 2-second tempo.
How should a client perform a Quadruped Drawing-In (centering) with extremity movement?
AKA BIRD DOGS
Client assumes quadruped position with knees under hips and hands/shoulders - they must maintain a neutral spine. They lift one arm + opposite leg off the floor and perform a slow controlled rep in which they lift and lower both limbs simultaneously.
How do you progress the Quadruped Drawing-In with extremity movement in an individual that is having difficulty stabilizing?
First, perform the exercise with only raising one arm for 1-2 sets with 10 reps and 2 second temp.
Then perform the same with only raising one leg.
Then once all limbs have been worked, move into performing it with raising contralateral limbs.
In the core function stage of Proximal Stability, in what order do you progress through the exercises of Supine Drawing-in and Quadruped Drawing-in?
First you work on Supine Drawing-in, once that demonstrates good activation of the core and pelvic floor, they may move onto quadruped drawing-in.
What is the goal of the hips and thoracic spine stage in proximal mobility phase? And what should be the focal point?
The goal is to improve mobility between these two joints that are adjacent to the lumbar spine. The focal point comes from previous postural observations during movement screens and any limitations that need improved.
What is a monoarticulate muscle? Give an example muscle.
One that crosses one joint.
Example: soleus muscle
What is a biarticulate muscle? Give an example muscle.
One that crosses two joints.
Example: Hamstrings
Why should trainers incorporate flexibility exercises in all 3 planes?
Because muscles contribute to movement in all 3 planes.
What is the objective of the cat-camel motion exercise?
To improve extensibility within the lumbar extensor muscles.
What is the objective of a pelvic tilt movement?
To improve hip mobility in the sagittal plane.
What is the objective of the pelvic tilt progression of supine bent-knee marches?
To improve hip mobility in the sagittal plane without compromising lumbar stability during lower-extremity movement.
What is the objective of the pelvic tilt progression of modified dead bug with reverse bent-knee marches?
To improve hip mobility in the sagittal plane without compromising lumbar stability during lower-extremity movement.
What is the objective of the lying hip flexor stretch?
To improve mobility of the hip flexors in the sagittal plane without compromising lumbar stability.
What is the objective of the half-kneeling triplanar stretch?
To improve mobility of the hip flexors in all 3 planes without compromising lumbar stability.
What is the objective of the lying hamstring stretch?
To improve mobility of the hamstrings in the sagittal plane without compromising lumbar stability.
What is the objective of the shoulder bridge (glute bridge) movement?
To improve hip mobility and stability and core stability by activating gluteal muscle groups.
What is the objective of the supine 90-90 hip rotator stretch?
To improve hip mobility in the transverse plane.
What is the objective of the spinal extensions and spinal twists?
To promote thoracic extension.
What is the objective of spinal twists?
To promote trunk rotation, primarily through the thoracic spine with some lateral hip mobility.
What is the objective of rocking quadrupeds?
To promote hip and thoracic mobility while simultaneously maintain lumbar stability.
How does the scapulothoracic joint impact the mobility of the glenohumeral joint?
The glenohumeral joint’s ability to achieve a degree of movement is contingent upon the stability of the scapulothoracic region.
Why does stability of the scapulothoracic region require synergistic action from force-couples?
Because the scapulae only attach to the axial skeleton via clavicles, stabilization requires muscular balance within the force-couples of the joint.
Why would a programme promoting scapulothoracic stability may need to include stretches to promote extensibilty of both the muscle and joint structures?
Because many muscles of the scapulothoracic region cross the glenohumeral joint and require substanial amounts of mobility.
Why is it critical that an inferior glide of the humeral head during abduction of the arm?
Because the articular surface of the humeral head is almost twice the size of the glenoid fossa and cannot operate as a true ball-and-socket joint. This glide allows that.
If the deltoid acted alone during abduction, what would occur?
Pure superior glide would occur which would impinge the humeral head against the coracoacromial arch.
Why does promoting stability in the scapulothoracic region require thoracic mobility and good muscle balance?
With good thoracic mobility and muscle balance, the scapulothoracic region can effectively stabilize the scapula and control movement whilst the more distal mobilizers (e.g deltoids) can generate larger amounts of force.
Apart from thoracic mobility, what else is considered a key factor to promoting scapulothoracic stabilization?
- tissue extensibility
- healthy rotator cuff muscle function
- muscle balance within parascapular muscles
- the ability to resist upward glide and impingement against the coracoacromial arch during deltoid action
What are different stretches to do to stretch the inferior, posterior, anterior and superior components of the shoulder capsule?
Inferior - overhead triceps stretch
Posterior - bringing the arm in front and across body
Anterior - pectoralis stretch
Superior - placing towel in between bent elbow and chest, pull elbow downard and inwards
What is the key role of the serratus anterior in both closed and open kinetic chain movements to promote scapulothoracic stability?
During close-kinetic-chain movements, the SA moves the thorax toward a more fixed and stable scapulae. During open-kinetic-chain movements, the SA controls movement of the scapulae against a fixed rib cage.
Why are closed kinetic-chain movements considered more functional?
Because they mimic daily activites, load and compress joints, increase kinesthetic awareness and proprioception.
Why are open kinetic-chain movement not as effective and functional than CKC?
Because they do not restore coordinated parascapular control and can be too challenging in deconditioned individuals.
What is the objective of shoulder packing?
To kinesthetically improve awareness of good scapular position and to improve flexibility and strength of key parascapular muscles.
What position must a client perform rotator cuff conditioning muscles from?
A packed shoulder position.
What is the objective of the internal and external humeral rotation?
To improve rotator cuff function while maintaining good scapular position.
What is the objective of a diagonals movement?
To improve rotator cuff function with four integrated movements in two diagonal patterns at the glenohumeral joint and scapulothoracic joints.
What is the objective of reverse flys with supine 90-90?
To strengthen the posterior muscles of the shoulder complex.
What is the objective of prone arm lifts?
To strengthen the parascapular muscles.
What is the objective of a closed kinetic chain weight shift?
To stabilize the scapulothoracic joint and lumbar spine in a closed kinetic chain position.
Within the distal segments of the body, what muscles are often problematic and exhibit tightness/limited mobility?
The gastrocnemius and soleus muscles.
What is likely to happen once a stretch reaches the muscles flexibility limit?
It is likely compensated movement with further stretching past this point will occur.
Where does a person COG usually locate?
2 inches anterior to the spine in the location of the first and second sacral joints. But it varies from person to person.
The body is considered stable when its _____ __ ____ falls within its base of support.
line of gravity
What is the limit of stability?
The degree of allowable sway away from the line of gravity that can be tolerated without a need to change the base of support.
What factors need to be followed through static-balance exercises over a fixed BOS when introudcing static-balance training to core function?
- engaging the core musculature throughout each exercise
- performing them in seated positions using stable or unstable surfaces to impose small changes to the balance centers
- progressively manipulating training variables to challenge the body’s balance centers and LOS
- using more static exercises that maintain postural control for 5-10 seconds
Once core balance is deemed good, what two extra challenging variables can be added to exercises to challenge balance?
- reducing points of contact
- adding additional unstable surfaces
What are the training variables for static balance (core)?
- 2-3 times a week
- performing exercises toward the beginning of workouts before onset of fatigue
- performing 1 set of 2-4 reps, each for 5-10 seconds
What are the training conditions for static balance (core)?
- Changing BOS from wide to narrow
- Raising center of gravity
- Shifting line of gravity
- Sensory alteration in front of clients face, performing slow hand-eye tracking or slow head movements
- sensory removal such as closing eyes
What is increased during integrated movements that causes greater need for spine stabilization?
The effects of external loads, gravity and reactive forces.