Many reasons:
Putting too much exertions on weak muscles
working out or lifting wrong
heavier: therefore more strain on muscles
Skeletal Muscles
There are multiple organs: The brain, heart, kidneys, liver, lungs, skeletal muscles, and skeletal muscles during excercise.
Skeletal muscles can be consciously controlled during exercise, whereas cardiac and smooth muscles cannot be consciously controlled.
The diaphragm and intercostals for breathing
skeletal muscle
During contraction the two articulating bones move equally
the brain has 2 powerful systems work together to paralyze skeletal muscles during rapid eye movement sleep according to reaserch scientist may have better understanding
Though the skeletal does come under pressure during exercise, the movements are beneficial for strengthening the muscles and bones. Exercise also enhances flexibility.
Once you start to exercise, your body has to make sure that the muscles that are now working much harder receive the oxygen and fuel they need to keep contracting. The various body systems must begin to work faster and harder to meet this extra demand. The muscles start to work harder, requiring more oxygen and producing more carbon dioxide, which needs to be removed
Skeletal. Definitely. Skeletal Muscle moves bone whereas smooth muscle is found in organs and other parts of the body (stomach, veins, arteries, etc.)
The number of cells depends on how large the muscle is; muscles consist of fiber bundles, which are made up of myofibrils. A sarcomere is one of the segments that the myofibril is divided into. In each fiber bundle there are multinucleate cells, which can extend the length of the skeletal muscle. So, the number of cells in a skeletal muscle depends on the size of the muscle. for example, the number of cells in one of our triceps larger than one of the small muscles in a finger.
I could be wrong but, I think it would decrease your blood flow