Resistance Exercise Flashcards
Muscle Strength
The maximum force that a muscle or muscle group can exert during a contraction.
Power
Is the rate of performing muscle contractions over a distance for a specific period of time.
Endurance
Ability of the muscle or muscle group to sustain contractions repeatedly or over a certain period of time.
Each muscle is covered by ______.
Endomysium.
A _____ is a bundle of muscle fibers.
Fascicle.
Fascicles are covered by _______.
Perimysium.
Fiber is a ______.
Cell.
Sliding Filament Theory
Actin and myosin slide together to allow muscle contraction.
Threads of protein called ______.
Myofibrils.
Each myofibril contain smaller threads called ________.
Myofilaments.
The larger the ___________ of a muscle the more tension is produced during a max contraction.
Cross Section Area (CSA).
Response to a quick simulation. Quick contraction or relaxation.
Muscle Twitch
Frequency of contraction/twitches increase allowing no relaxation between. Muscle contraction will increase smoothly up to a point of maximum strength.
Tetany
_____ its axon and all of the muscle fibers which it innervates.
A Motor Unit.
Increasing strength of a contraction is accomplished by increasing the number of activated motor units.
Multiple Motor Unit Summation.
Fiber stimulated many times in a row with new contraction starting before the previous one ends.
Wave Summation.
Two changes occur to muscle due to resistance training.
- Adaptation. 2. Motor unit can activate the muscles.
Only 1-2 motor units contract 2-3 times/second.
Weak Contraction.
Greater number of motor units are recruited and fire more frequently.
Strong Contraction.
Only _______ maintains muscle mass and strength.
Muscle Training.
Increase in size.
Hypertrophy.
Decreased muscle mass.
Atrophy.
Exercise programs are beneficial to decrease _____.
DM II Onset.
Increasing the intensity or amount of weight.
Dosage.
