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Alterations in the nervous system firing pattern can occur as a result of training. Motor unit recruitment and the firing pattern to muscle can change with training also. The improvement in the firing pattern of nerves explains the initial improvement that occurs from strength training. Light exercise stimulates the recruitment of slow-twitch fibres whereas larger forces involved in things such as weight training recruit fast-twitch fibres. Please let me know if this helps- because that's what I wrote for my assignment!
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How do concentric muscle contractions contribute to overall muscle strength and performance?
Concentric muscle contractions, where the muscle shortens as it contracts, play a key role in building muscle strength and improving performance. These contractions help to generate force and power, allowing muscles to lift heavier weights and perform movements more efficiently. Over time, consistent engagement in concentric contractions can lead to muscle growth and increased strength, ultimately enhancing overall muscle performance.
Why does varying stimulus strength affects the twitch force?
Varying stimulus strength affects twitch force because it determines the number of motor units that are recruited to contract the muscle fibers. As the stimulus strength increases, more motor units are recruited, leading to greater force production. Conversely, lower stimulus strength recruits fewer motor units and results in weaker contractions.
How does concentric resistance training impact muscle strength and endurance?
Concentric resistance training can improve muscle strength and endurance by targeting the concentric phase of muscle contractions, which involves the shortening of muscles against resistance. This type of training helps to increase muscle force production and enhance the ability of muscles to sustain repeated contractions over time, leading to improvements in both strength and endurance.
What is an increasingly stronger contractions owing to increased stimulus strength known as?
The phenomenon of increasingly stronger contractions owing to increased stimulus strength is called recruitment. It involves activating more muscle fibers within a muscle to generate greater force in response to a stronger stimulus.
What are the differences between isometric, concentric, and eccentric muscle contractions?
Isometric muscle contractions happen when the muscle stays the same length, concentric contractions occur when the muscle shortens, and eccentric contractions occur when the muscle lengthens.
The muscle of the arm such as the biceps brachii have what innervation?
Musculocutaneous
Which upper limb muscles has double innervation?
The flexor carpi ulnaris muscle is an upper limb muscle that has double innervation from both the ulnar and medial nerves.
What is The main effect of the warm up period of athletes as the muscle contractions increase in strength?
they warm up their muscles to avoid damaging them
What muscle actions would be classified as isotonic contractions?
Isotonic contractions involve muscle actions where the muscle length changes as it contracts against a constant load. There are two types: concentric contractions (shortening of the muscle during contraction) and eccentric contractions (lengthening of the muscle during contraction).
Why is Adductor magnus muscle considered as a hamstring muscle sometimes?
Due to its common embryonic origin and its innervation and action.
What process involves muscle contractions that move food through the esophagus molecules?
Different types of muscle contractions
What happens when summation occurs in cardiac muscle?
Basic muscle summation -an increase in the frequency with which a muscle is stimulated increases the strength of contraction. With increased stimuli to the heart if summation occurred the contractions would keep increasing.
