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8 Cards in this Set
- Front
- Back
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Describe neural adaptations that occur with resistance training
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-CNS is able to recruit more motor units due to increased neural drive
-Synchronicity of motor unit recruitment improves -Neuromuscular junction morphology improves -Fewer agonist/antagonist muscles are coactivated -Autogenic inhibtion is decreased -Rate coding is increased (alpha motor neuron firing increases) |
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What is transient hypertrophy?
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Increase in muscle size during and immmediately after exercise due to fluid from plasma moving into muscle
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What is chronic hypertrophy?
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Increase in muscle size as a result of long-term training
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What is the difference btween muscle hypertrophy and hyperplasia?
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Hypertrophy= incease in fiber size (cross-sectional)
Hyperplasia= increase in number of fibers as a result of one splitting apart and forming two fibers |
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What happens duirng immobilization or cessation of training?
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Decreased strength (due to decreased cross scetional area, protein synthesis, neuromuscular activity)
Affects Type I fibers more! |
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What is acute muscle soreness?
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Immediate soreness in the muscles following working out dur to accumulation of H+ and tissue edema (fluid shifting into muscles from plasma)
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What is DOMS and why does it occur?
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Delayed Onset Muscle Soreness
12-48 hours after exercise, primarily due to eccentric exercise -Structural damage, build up of irritants, impaired calcium homeostasis, increased macrophage activity -may be caused by inflammatory reaction in damaged muscles |
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How does DOMS affect performance and how can it be reduced?
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Max force generation decreases but gradually returns
Loss of strength is due to failure of excitation-contraction process, loss of contractile proteins, physical disruption in muscle Solutions: reduce eccentric contractions early in exercise, start slow and gradually increase intensity or overload eccentric movements early which will hurt but prevent future soreness |
