Exam 1 Flashcards
Is ballistic stretching really stretching?
No, it is more of a contraction. Therefore, the individual is more at risk for injury
Definition of creep
Tissue continues to deform during stress until the load is balanced, which is known as the creep phenomenon
What are some benefits to stretching and flexibility?
- Improve balance
- Easier to strengthen and endurance train
- Injury prevention
- Quicker recovery
- Reduce soreness
- Facilitate relaxation
What is Tropocollagen?
AKA collagen
Provide strength to withstand tension and force of movement
Protein building block in CT
Where is collagen found?
Bone, tendon, skin, muscle, cartilage, and joints
What is Type I collagen?
Thick fibers
Most abundant
What is Type II collagen?
Thinner
Less tensile strength
What is Type III collagen?
Found in organs
Wound repair
What is elastin?
Protein in tendons that allow for more flexibility
Assist collagen after stress recovery
What is viscoelasticity?
Stress strain curve
What is elasticity?
Ability to return to original state following deformation
What is viscosity?
Ability to resist change of form or lessen shearing force
What is the toe region?
Take up slack in tissue
What is the elastic region?
Linear increase in response to stress
Pulled at different levels
What is the plastic region?
Plateau on strain and then hit where you have enough stress for injury
T/F stiff tissue reach faliure a lot quicker
True
What does rate of stretch affect?
Affect strain
What does slower rates of stress affect?
Greater strain
What does faster rates of stretch affect?
Smaller elongation
What is stress-relaxation?
AKA force-relaxation
No change in length is produced
How does temp affect creep?
High temp = increase creep
How do you produce creep with high temps?
High temp and large load over a period of time
What are benefits of a warmup?
Increase blood flow
Increase Mm temp
Cardiac response improvement
Breakdown of oxyhemoglobin for delivery of O2 to working Mm increased
What are advantages to static stretch?
Reduce chance to exceed strain
Reduced energy requirement
Reduce potential for Mm soreness
Easy to teach
What is ballistic stretching?
Least desirable
Place tissue at risk
Stimulate Mm spindles during the stretch = continuous resistance to further stretch
What is dynamic stretching?
Use Mm contraction to stretch
Increase/decrease jt angle where Mm cross = elongate MT unit at the end of ROM
Activity specific movements
What is PNF?
Use different techniques to promote neuromuscular response
Increase ROM by decreasing resistance caused by spinal reflex pathways
How many weeks is needed of stretching to see significant change in flexibility?
6 weeks
How many minutes of light exercise is needed prior to stretching?
About 5 min
How to stretch soft-tissue contractures?
Long-duration and low-load
How long is immature scar tissue adaptable for?
8 weeks
Becomes less changeable up to 14 weeks after that
When do you have a mature scar?
14 weeks
What is scar tissue?
Collagen fibers become highly unorganized and randomly arranged
What are some critical components of scar tissue?
Time-dependent, stress-reactive nature
Fragility of immature scars
New scar tissue organizes and aligns itself along lines of stress
Low-load with long duration combined with preheating
What is the low-load, prolonged stretch technique?
Preheat involved areas
Place structure in comfortable position
Apply MHP 20-60 min
Apply stress or load gradually but minimally
Allow rest and recovery
Maintain heat app for 5-10 min after removal of load
What is muscle strength determined by?
- Neural control
- Cross-sectional area
- Mm fiber arrangement
- Mm length
- Angle of pull
- Fiber type distribution
- Energy stores, recovery from exercise, fatigue, age, gender, and state of health
When is it least likely that you are strengthening Mm?
At max ROM
What are slow twitch Mm fibers?
Type I - red oxidative
Large, numerous mitochondria, triglycerides, enzymes for aerobic work
Low ATPase and glycolytic activity, lower Ca handling ability, shorter speed
Good for ENDURANCE
What are fast twitch Mm fibers?
Type II - white glycolytic
Anaerobic, contract at higher speed
High levels of myosin ATPase provides energy for speed of contraction
Low myoglobin and few mitochondria
3 subtypes
What are the muscle fiber types from slowest to fastest?
Slow twitch Fast twitch Fast twitch A Fast twitch AB Fast twitch B
What is isokinetic exercise?
Speed held constant regardless of magnitude of force applied to resistance
How do we measure strength?
MMT Cable tensiometry Dynamometry One-rep max Isokinetics Functional assessment
What are functional tests that can be done for strength?
One-leg hop for distance
Single-leg triple hop for distance
Timed single-leg hop (MT)
Vertical jump
Strengthening exercises from least to most amount of force
Concentric
Isometric
Eccentric
Strengthening exercises from most to least ATP released
Eccentric
Isometric
Concentric
What is the overload principle?
Application of load that exceeds metabolic capacity of Mm
What is SAID principle?
Specific adaptations to highly specific demands
What is the progression principle?
Intensity of program must become progressively greater to continue to make gains
What is the reversibility principle?
Changes are transient unless training induced improvements are regularly used
How do we know when to increase weight?
Gold standard = 1 rep max
Find a weight they can do 8-12 reps with without fatigue
What are signs of fatigue?
Poor form
Speed
Shaking
What is DOMS?
Pain, swelling, tenderness, reduced ROM, and stiffness
What are some theories about DOMS?
Lactic acid Torn tissue Tonic Mm spasm CT damage Tissue fluid
Most likely torn tissue
What is DeLorme PRE?
3 sets x 10 reps max
Arbitrary increase in resistance each week
What is the Oxford program?
Establish pt 10 RM for first set, move to 75% RM for second set, and 50% of 10 RM for third set
What is Knight daily adjustable PRE?
4 sets with variable reps and varying weights
What is the rule of tens?
Isometric exercise protocol
10 sec hold for 10 reps with 10 sec rest in between
Should be gradual tension for first 2 sec, max at 6, and decrease for 2
What is circuit training?
Predetermined and organized sequence of exercise
General body condition and total fitness
1 or 2 exercises to each body part
30-60 sec rest period between sets
Use resistance and aerobic metabolism
What is the proper contraction order?
Isometric - concentric - eccentric
What are plyometrics?
Intense power-generating exercise (sport-specific)
Adaptable with general ortho
High-intensity, task specific, dynamic
Based on GTO response and muscle spindle response
IE. Jumping, skipping, hopping, throwing, catching
For power and speed
When would you not use CKC exercise?
If there is pain, swelling, dysfunction, or weakness
What are considerations a PTA should have when helping the elderly strengthen?
Natural decline in Mm performance, force-generating capabilities, and Mm mass
Focus on delaying Mm atrophy, improve function, and increase force-generating capabilities by stimulating Mm hypertrophy
You can see similar gains to younger individuals
General recommendations for strengthening older adults?
MD approved Close supervision initially Monitor vitals Low resistance, low reps initially Progress reps Avoid high resistance to decrease stress Train 2-3x/wk with 48 hr rst intervals Use balance of flex/ext exercise Use supported positions if balance is a problem
When to start strengthening prepubescent/child
Girls: 11
Boys 13
When to start strengthening prepubescent/adolescents?
Girls: 12-18
Boys: 14-18
Define muscular endurance
Ability for Mm to perform at a certain level for prolonged periods of time
Define CV endurance
Ability for one’s CV system to allow performance for a prolonged period of time
Define catabolism
Creates energy for the body
Fuel converted to ATP
3 metabolic pathways
Continuation of endurance-based activity requires constant supply of O2 to produce ATP
What is the oxidative system?
Produce 19x the ATP produce in phosphagen energy system
2 ATP
What are the guidelines for the talk test?
Moderate intensity - able to talk
- 5 hrs/wk
- IE walk briskly, water aerobics, doubles tennis, cycling at less than 10 mi/hr
Vigorous - pause to talk
- Intensity exercise 2.5 hr/wk
- IE. running, swimming laps, singles tennis, and cycling greater than 10 mi/hr
What is the recommended amount of exercise for children?
60 min of mod-intensity exercise each day
Vigorous intensity for 3x/wk
How to measure exercise intensity?
VO2 max
Talk test
THR
How do you calculate target HR?
THR = MHR x desired intensity
What is target HR?
50-70% of one’s max HR
What is Borg Rating of Perceived Exertion?
Assess exercise intensity based on person’s perception of exertion
How do you determine HR from Borg scale?
Multiply perceived rating by factor of 10 (loose association)
What should someone’s Borg scale rate?
Between 12-14
How do we perform aerobic muscular endurance?
Sets of high reps
15 reps per set
Each rep should be performed at or below 67% of 1 RM max - 1-2 min rest period between each set
What are CV assessments for older adults?
6 min walk test 2 min walk test 400 m walk test 1 min sit to stand 2 min step test 3 min step test
What is the 6 min walk test?
Multiple pt pops Take vitals before Walk behind them Provide encouragement Keep time - can stop and rest, but need to stand
What is the 2 min walk test?
Mod to severe CP disease, more frail, and those who cannot walk for long periods of time
Similar to 6-min test, but shorter
What is the 400 m walk test?
Instruct pt to complete 10 laps
Pt seem more motivated to complete distance
What is the 1 min sit to stand test?
Adding endurance component compared to 30 sec
What is 30 sec sit to stand test?
More about power and strength
What is 2 min step test?
Marching test
Take measurement b/t ASIS and mid-patella - measure on the wall and that is how high they have to march
Adds value of SLS
What is 3 min step test?
Faster HR returns to resting = healthier you are
Typically done in healthy adults
Done to metronome
What should post-op exercise entail in ortho?
- Lost strength
- Pain
- Swelling
- Flexibility
- Local Mm endurance
- Build CV fitness
- Gait and balance
- Motor control and NM elements of function
What is the #1 indication of falls in elderly?
Lack of DF
What is the #1 strength indicator in elderly?
Weak quads
What factors contribute to balance and coordination?
- Visual
- Vestibular
- Somatosensory
- ROM and flexibility
- Strength
- Posture
Why do we look at the ground as we age?
Depend more on visual component of balance = lean forward
What is balance?
Ability to maintain COM over BOS
What is BOS?
Area within the body to make physical contact with external environment
Base not fixed
How do we maintain postural equilibrium?
Postural nervous system and MS system
What is the definition of coordination?
Ability to produce patterns of body and limb motions in context with environmental objects and events
What is proprioception?
Sensory (afferent) info regarding jt position
Movement (kinesthetic)
Movement resistance and tension
What is neuromuscular control?
Subconscious activation of Mm occurring in preparation for and in response to jt motion and loading
What are mechanoreceptors?
Sensory receptors that are responsible for converting mechanical events into neural signals that can be conveyed to CNS
Each mechanoreceptor response to specific stimuli and has its own threshold
Where are mechanoreceptors located?
Musculotendinous structures
IE. Muscle spindles and GTO
What are the mobility tests?
- TUG
- Gait speed
- Backward walk test
- Timed up and down stairs
- Tandem walk test
- 4 square step test
- Dynamic gait index
- Functional gait index
What is the benefit of the TUG?
- Good first test
- General mobility of LE function
- Minimal detected change
What is a dual task TUG?
Pt is able to do another task while walking
IE subtraction task, carrying glass of water, etc
What is the benefit of the gait speed test?
Considered 6th vital sign
Slow gait = #1 predictor of functional decline
Valid for health status, mortality, falling, and fear of falling
What is the benefit of the backward walk test?
Helps to see how one’s ability is to open doors, open the oven, backup to sit, etc
What is the benefit of the timed up and down stairs test?
Functional mobility
Go up/down 4-12 stiars
Can use AD
Do not time the turnaround
What is the benefit of the tandem walk test?
Measure of gait, mobility, and balance
Do it with EO vs EC
10 steps on a line
More specific for those with vestibular or peripheral neuropathy issues
What is the benefit of the 4 step square test?
Quantify balance in 4 different directions and its reversal
Good cognitive data to follow instructions
Ability to pick up feet
Greater than 15 sec = greater fall risk
Very good specificity and sensitivity
What is the benefit of the dynamic gait test?
Used on individuals with vestibular issues
8 and 4 item test - 4 item has same validity as 8
Scored 0-3 - higher the score the better
What is the benefit of the functionality gait test?
7 items
What are the various balance tests?
- Functional reach
- One-leg stance
- Romberg and sharpened Romberg
- CTSIB and mCTSIB
- Berg Balance Scale
- Four stage balance test
What is the functional reach test and its benefits?
Slide hand down the ruler and measure in inches
Look at DF
Look at how the COG of shift is
What is the one-leg stance and its benefits?
Portrays static postural control
Help establish fall risk
Very difficult for elderly
Fail = hop, touch of foot to leg, or arms move dramatically
What is the Romberg and its benefits?
Standing with legs together and test EO/EC
Test integrity of proprioceptive pathway and vestibular function
What is the Sharpened Romberg and its benefits?
Same as Romberg, but in tandem stance
What is the CTSIB and mCTSIB and what are their benefits?
Putting a dome on pt head. Don’t normally do in mCTSIB
Done a lot in home health
1st test feet together EO
2nd test feet together EC
3rd test feet together on foam EO
4th test feet together on foam EC
What are self reported scales on balance?
- Activities specific balance confidence scale
- Modified gait efficacy scale
- Falls efficacy scale
- Fear of falling avoidance behavior questionnaire
What is the Y Balance Test?
Test a person’s risk for injury
Can be used for UE and LE
AKA star excursion
What are the factors that contribute to balance dysfunction?
- Perception
- Behavior
- ROM
- Biomechanical alignment
- Weakness
- Sensory
- Synergistic organization strategy
- Coordination
- Adaptability
What is the definition of mobilization?
Restore joint motion or mobility, or decrease pain associated with joint structures
What is closed packed position?
When a joint is most congruent
What is close packed good for?
Testing integrity and stability
What is loose-packed position?
Joint capsule and ligaments are most relaxed and least congruent
What is loose-packed position good
Ideal for joint mobs
Which joint mob grades are used for pain?
Grades I and II
Which joint mob grades are used for ROM?
Grades III and IV
What is a grade I mob?
Small oscillations
What is a grade II mob?
Start to midway
What is a grade III mob?
Midway to end
What is grade IV mob?
All the way and knock on the door
What is a grade V mob?
PTA does not do
High velocity thrust of small amp at the end of available ROM
What is joint play?
Motion available within the joint
How long are joint oscillations involved?
3-6 sets of oscillations
Perform 2-3 oscillations per second
Last 20-60 sec for tightness
Last 1-2 min for pain with 2-3 oscillations per second
For painful joints apply distraction for 7-10 sec with few sec rest in between
How long should mobs be done for restricted joints?
Apply min of 6 sec stretch, followed by partial release and then repeat with slow, intermittent stretches at 3-4 sec intervals
What is a muscle spasm end feel?
Pain with sudden halt of movement that prevents full ROM
What is a springy block end feel?
Internal derangement - full motion limited by soft springy sensation with pain
What is a loose end feel?
Min resistance is felt at end range - jt hypermobility
What is capsular end feel?
Normal tissue stretch before normal ROM
What are absolute contraindications to joint mobs?
Osteoporosis, RA, jt hypermobility, and neurologic symptoms
How long are Grade I or Grade II mobs?
1-3/sec or 60-180/min
Applied for 0-60 sec (only 4-5x)
Treat painful conditions daily or until pain is reduced
What are the 4 stages of pharmacokinetics?
Absorption
Distribution
Metabolism
Excretion
What is half-life?
Amount of time it takes to reduce the drug’s blood concentration to half
Liver metabolism and renal clearance can slow a half-life and impair secretion
What is duration of action of a drug?
Length of time it is active in the body
Longer half life = longer duration
What are pharmacodynamics?
Describes what the med does in the body
IE. Dose-response relationship, therapeutic window, adverse effects, toxicity, tolerance, and dependency
What is the therapeutic window of a drug?
Min needed for therapeutic use without toxicity
What causes someone to be dependent on a drug?
Withdrawal symptoms
What is considered a 5th vital sign?
Pain
What is nociceptive pain?
Pain resulting from tissue damage
Inflammatory, noninflammatory, or both
IE. Bone pain, sprains, and postsurgical pain
What treats inflammatory pain?
Antiinflammatory
NSAIDS
Cox-2 inhibitors
What is neuropathic pain?
Pain resulting from damage or dysfunction of nerves
Relatively resistant to opioids, acetaminophen, and antiinflammatory agents
Use meds that will cross BBB and target CNS
Use meds to slow or block nerve conduction (antidepressants and anticonvulsants)
- IE. Cymbalta, Lyrica, Tegretol, Lidocaine, Ultram
How to treat acute pain?
Round the clock dosing
- IE. opioids, acetominophen, NSAIDS (quick onset)
How to treat chronic pain?
May be prescribed long-acting release meds
What is “breakthrough pain”?
Pain can be treated with short-acting meds
What do opioid analgesics do?
Work by blocking CNS transmission of pain and create a euphoric feeling
IE. Morphine, oxycodone, hydrocodone, codeine
What are common side effects of opioids?
Nausea, vomiting, allergic reaction, sedation, drowsiness, dizziness, constipation, impaired judgment, risk of injury from falling
What is acetaminophen?
Most commonly used OTC fever reducer and analgesic
Used for HA, sinus pain, back pain, OA, and toothaches
No strong antiinflammatory properties
Can contain other meds
Can be given to someone with GI bleed, CHF, and HTN
What is the max dosage of acetaminophen?
No more than 4000 mg/day
What happens if you overdose on acetaminophen?
Hepatotoxicity
What are NSAIDS?
OTC - IE. aspirin, ibuprophen, naproxen, and kefoprofen
Fever reducer and antiinflammatory
Found in cold meds and some sleep aids
Can you use NSAIDS in children?
NEVER = could cause fatal illness (Reye’s Syndrome)
What are Cox-2 inhibitors?
Lower risk of side effects compared to NSAIDS
Inhibit production of prostaglandins by inhibiting COX enzyme
Fewer bleeding and stomach related side effects
Who would not be eligible for COX-2 inhibitor?
Someone with an allergy to sulfonamide antibiotics
What are corticosteroids?
Glucocorticoids produced naturally by adrenal cortex
Powerful antiinflammatory and immunosuppressuant used in RA, OA, gout, CTS, bursitis, and lupus
What should happen after corticosteroid injection?
Pt should minimize activity and stress for several days
Pain decrease within 24-72 hr after injection
Can benefit for 4-8 weeks
What are side effects of corticosteroids?
Elevated blood glucose
Edema, cataracts, glaucoma, stomach ulcers
Insomnia, risk of infection, and mood changes
What is the most common joint to get corticosteroid injection?
Knee
Who would not receive a corticosteroid shot?
Someone with diabetes
What are examples of CV meds?
- Beta blockers
- Ca channel blockers
- Digitalis
- Bronchodilators
- Diuretics
- Lipid-lowering drugs
What are beta blockers?
Blunts HR and BP response
What are Ca channel blockers?
Decrease resting and exercise BP response
What is Digitalis?
May cause dysrhythmias and/or tachycardia
What PT/INR level would not get exercise?
Less than 3