ExPhys, Strength, and Conditioning Flashcards
Definition:
Aerobic
Definition:
With Oxygen
Definition:
Anaerobic
Definition:
Without Oxygen
Definition:
Exercise Duration
Definition:
The amount of time that the athlete spends training per session
Definition:
Exercise Frequency
Definition:
The number of times per week the athlete trains
Definition:
Exercise Mode
Definition:
The form of exercise performed
Definition:
Exercise Intensity
Definition:
How hard the athlete is training
How is the Exercise Intensity determined?
Amount of weight lifted
Number of repetitions performed
Heart Rate… etc
Definition:
Interval Training
A predefined and alternating spacing of exercise and rest periods
Which parts of interval training can be manipulated?
Rest periods (length, active v static) Exercise Bouts (intensity, mode, duration, number of intervals)
Definition:
Relief Interval
Definition:
Recovery period, measured in time or distance
Definition:
Work Interval
Definition:
The training period, measured by time or distance
Definition:
Work/Relief Interval Ratio
Definition:
The ratio of work interval to relief interval
The Work/Relief Interval for ATP/PC
The Work/Relief Interval is 1:3+
The Work/Relief Interval for LA
The Work/Relief Interval is 1:2
The Work/Relief Interval for O2
The Work/Relief Interval is 1:1
Why are agonist and antagonist outdated?
Each phase of a sport must be evaluated for muscle action, muscle roles can switch in different phases of general movements.
Definition:
Stabilizer Muscles
Definition:
Muscles that specialize in joint control and concentricity
Where are stabilizer muscles located in relation to the joint?
Stabilizer muscles are located close to or deep within the joint.
In which direction do stabilizer muscle fibers run?
Stabilizer muscle fibers run horizontal to the plane of the joint.
When do stabilizer muscles contract?
Stabilizer muscles contract with most motions of the joint, especially if the joint motion is rapid.
Which muscles are considered to be more of a stabilizer?
Transverse Abdominus Multifidus Rotator Cuff VMO Posterior Glute Medius Deep Longus Capitus Longus Colli Semispinalis Cervicus
What is stabilizer muscle integrity dependent on?
Stabilizer muscle integrity it dependent on muscle stiffness.
What is muscle stiffness dependent on?
Alpha and Gamma motor loops with the CNS.
What are the 2 components of muscle stiffness?
Intrinsic Stiffness
Reflex Mediated Stiffness
Definition:
Intrinsic Stiffness
Definition:
The viscoelastic properties of the muscle and tendon
What determines the viscoelastic properties of muscle?
Actin and Myosin
Definition:
Reflex Mediated Stiffness
Definition:
Stiffness dependent on the excitability of the motor neuron pool
What is the excitability of the motor neuron pool dependent on?
Muscle spindle action and the feed-forward system
What has poor muscle stiffness been associated with?
Poor muscle stiffness has been associated with poor joint stabilization.
What happens when the local stabilizer muscles are partially contracted?
Partial contraction of stabilization muscles increases proprioceptive acuity of the joint through enhanced sensory properties and improved stiffness.
Definition:
Co-contraction
Definition:
When multiple stabilizer muscles activate to further stabilize a joint
Definition:
Reciprocal Inhibition
Definition:
Where agonist muscle activation relaxes the antagonist muscle
Does reciprocal inhibition play a role in co-contraction?
No, a special neural loop program bypasses reciprocal inhibition during co-contraction?
When is co-contraction most effective?
Co-contraction is most effective when the muscle is in mid-range/neutral position.
What may diminish “natural” co-contraction?
Unidirectional strength training
What are the benefits of oscillatory stabilization training?
Neutral joint range
Co-contraction occurs
Multi-directional
Can be sport/motion specific
A working muscle needs _____ more blood than at rest
70x
How do rhythmic activities improve the efficiency of blood flow?
The “milking action” of alternating contraction and relaxation assists with pushing blood back to the heart.
Is Blood Pressure higher when training UpEx or LowEx?
Training UpEx increases Blood Pressure, bigger concern for hypertension.
During the onset of activity, the increase in blood pressure is due to:
Inc demand for blood flow
Delay in vascular dilation response
Autonomic response from cognitive thoughts
Definition:
Blood Flow
Definition:
O2 and Glucose delivery, exhaust of biproducts
Loop:
Autonomic Response from Cognitive Thoughts
Loop:
Feed Forward = thought of training increases muscle tone
Blood pressure decrease is due to:
Dilation of arterioles of the working muscles
Why is an active cool down necessary?
Dilation of the arterioles do not return to normal tone properly, vascular pooling occurs, muscle contraction results in “muscle pump” to assist with pushing blood back to the heart
At what percent of maximal contraction is the blood is a muscle occluded?
60%
What happens during static or isometric contractions?
Stopped blood flow creates an anaerobic environment, further requiring muscles to use glycolysis, resulting in more pain producing by products.
Muscle Contraction Step 1
Ca lands on troponin, causes the tropomyosin to “tighten” within the helix/groove of the actin filament, uncovering an active actin site.
Muscle Contraction Step 2
Myosin head is attracted to the active actin site. Contact causes reflexive contraction until ATPase (cone - Mg) cleaves a phosphate off the ATP. Myosin is then released from the active actin site. Myosin head will grab next site if available.
Muscle Relaxation
Neurological stimulation ceased
Ca pumped back into T-tubule
Troponin has nothing to grab, tropomyosin regains original shape covering up the active actin site
2 Classes of Muscle Types
Type I, Slow Twitch, Red Fibers
Type II, Fast Twitch, White Fibers
Definition:
Slow Twitch, Type I
Definition: Fatigue resistant Less ATPase Slower contraction rate More, bigger mitochondria
Definition:
Fast Twitch, Type II
Definition: Fatiguability More ATPase Faster contraction rate More Ca cycling
Types of Fast Twitch Fibers
Type IIa
Type IIb
Type IIc
Type X
Definition:
Type IIa Fibers
Intermediate fiber that maintains ability for aerobic and anaerobic function
Definition:
Type IIb Fibers
More purely anaerobic fibers
Definition:
Type IIc and Type X
Recently typed, unsure of functionality
Definition:
ACTN3
Gene that encodes the protein Alpha-Actinin-3, structural proteins in the Z line, related to the speed of contraction.
How long does it take to convert Muscle Fiber Typing?
About 6 weeks
Definition:
The “Size Principle” of muscle recruitment
Definition:
Smaller units fire first, followed by larger ones.
Type I, Type IIa, Type IIb
Definition:
Motor Unit
Definition:
An alpha motor unit and all the muscle fibers it innervates
Small motor units act as stabilizers or mobilizers?
Stabilizers
Large motor units act as stabilizers or mobilizers?
Mobilizers
Which type of contractions are commonly a component of muscle injury?
Eccentric contractions
Eccentric Contractions are typically associated with:
Pain
Muscle swelling
Hyper contracture
Loss of Protein
What may happen during the overstretch of the sarcomere during eccentric contraction?
cell membrane damage causing an unwanted influx of Ca and Na leading to inflammation and pain
Which form of condition was more efficient in establishing strength gains?
Eccentric
Definition:
Fatigue
Definition:
A potential cause of injury due to deconditioning
Glycolytic Fatigue Theory
Glycolysis causes build up of CrP, Pyruvate, and LA byproducts
LA creates acidic environment slowing the force relaxation rate
CrP binds with Ca, decreasing available Ca available for contraction
Oxygen Fatigue Theory
Decreased O2 to working muscles forces anaerobic metabolism, primarily in slow twitch fibers
CNS Fatigue Theory
Decreased neural input to the brain
Decreased stimulation to the alpha motor neurons
Sensation of pain
PNS Fatigue Theory
Decreased excitation coupling at the NMJ.
Slowed relaxation rate
At 10% drop in force contraction, velocity of contraction is affected
Fatigue is noticeable when power is affected
Definition:
DOMS or DLR
Definition:
Delayed Low-Frequency Recovery
Causes of DLR
Acidic environment
High Ca levels
Microtrauma to muscle fibers
High free radical levels
Treatments for DLR
Vitamin C Vitamin E Rehydration Massage Tart Cherry Juice NOT cold immersion
Definition:
Muscle Coordination Principle
Definition:
Interaction controls the level of muscle activity output, small to large pattern of recruitment for efficient muscle contraction
Definition:
Connective Tissues
Add bulk to muscle
Assist with transmission of force
Plays a passive role in joint capsule and ligaments
Adaptation to increased loads, muscle vs connective tissue
Muscle - Days
CT - weeks-months
Definition:
Training
Definition:
The regular, systematic, and goal oriented application of exercise, over a period of time, which results in physiological adaptations
Definition:
Overload Principle
Definition:
A physiologic process must be challenged safely for the body to “learn” how to function more efficiently.
How is an Overload achieved?
Manipulating combinations of frequency, intensity, mode, and duration
Definition:
Individual Differences Principle
Definition:
Training benefits are optimized when programs are planned to meet the individuals needs and capacities of the participants.
Definition:
Reversibility Principle
Definition:
The effects of a regular exercise program are transient and reversible. Detraining occurs rapidly, can be noticed after 1-2 weeks.