In a large mass of muscle deprived of its circulation, the rate at which the recovery process can go on, after severe stimulation, depends on the rate at which oxygen can reach the fibres by diffusion.
Sentiment: NEGATIVE
Muscles do not use oxygen at a constant rate.
One of the fundamental characteristics of striated muscle, and the one involving the greatest difficulty in investigation, is the great rapidity with which changes take place in it.
The thing about motor neuron disease, once a muscle stops working, it doesn't start again.
That a strong stimulus to such an afferent nerve, exciting most or all of its fibres, should in regard to a given muscle develop inhibition and excitation concurrently is not surprising.
If you do not use a muscle or any part of the body, it tends to become atrophic. So is the case with the brain. The more you use it, the better it becomes.
Anticipation of movement, through muscular innervation and memory, by its retention of nerve impulse images, extend the present to the limit of a second or so.
If you only exercise your soloist muscles, the other muscles quickly atrophy.
In many organisms, including man, the mechanical respiration and the circulation of the blood are 'regulated' so as to correspond to the demand of the moment.
One knows that after violent exercise one breathes heavily for some time: the more violent the exercise, the longer one's respiration is laboured.
The body needs to rest. It needs a lot less exercise than you think.
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