The Cause Of The Skeletal Muscles Is Often Sore And Tired Quickly?

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why do skeletal muscles often feel sore or tire quickly?

1 Answer:

Hi lolaratri,


Thank you for asking HealthReplies.com.

In general, muscles in the human body are divided into 3 types, namely skeletal muscles (striated, skeletal), smooth muscles, and heart muscles. Skeletal muscles are muscles that attach to the human body skeleton. This muscle works subconsciously (voluntary) with orders from the brain. Histologically, this muscle has a long cylindrical shape, with light dark lines, has many cell nuclei at the edges. Skeletal muscles are able to work and react quickly. However, this muscle is more prone to fatigue and also aches. Why is that?


Before explaining it, it seems you need to understand first how the mechanism of skeletal muscle works. Here's the explanation:


In the neuromuscular bridge, acetylcholine is extended from the synapse terminals to the receptors. This condition will produce changes in the transmembrane potential that spreads across the entire surface and along the T tubule. Furthermore, the sarcoplasmic reticulum will release calcium reserves, this caldium will bind to troponins and produce a change in the orientation of the troponin-tropomyosin complex that appears in the active part of actin. Then, the bond between the myosin head and the active part will form a cross-brigde myosin, and a muscle contraction occurs which is marked by a shift in filaments and a shortening of muscle fibers. This cycle occurs in the presence of ATP (adenosine triophosphate) hydrolysis until finally relaxation occurs.


Muscle fatigue that causes pain can result from the following factors:

Lactic acid buildup that comes from pyruvic acid metabolism to provide ATP
Lack of glycogen, which is the result of glucose metabolism which is stored in the liver and muscle cells to be used as the main ingredient for energy production

Performing extreme and repetitive movements without being balanced with continuous physical exercise and inadequate muscle nutrition can trigger muscle fatigue more quickly, causing pain. In mild conditions, this pain will generally improve with rest and cold compresses (ice cubes). However, if the complaint does not improve with this step, it may need further examination and treatment by a doctor.


So much information from us. For more details, you can consult directly with your nearest doctor or biology teacher.


Hope it helps ..

dr. Nadia Nurotul Fuadah

: by

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