Well if you think of your penis, once you start to get a boner, you cant stop it, the muscles are getting harder and harder and cant be stopped
Yes
Like all the skeletal muscles, it becomes hard, when contracted.
Synergy is the term for the ability of muscles to be slightly contracted at all times to be ready to act. Most of the muscles are usually in this form.
ya muscles contracted due to actin and myocin protein comtracted
tibialis anterior
What has been contracted for
That is very good question! You do not have any thing like partially contracted muscle fibres, most probably. What you have got is partially contracted muscles. The muscle is more or less contracted as per the number of muscle fibres that are contracted at any given time.
All of the muscles in the muscle fiber have contracted when there is a maximal voltage and there is a maximal voltage to prevent injury to our muscles. Dr. Sayed
internal intercostals and rectus abdominus
the contraction of our muscles which are contracted by neurones carrying impulses from the brain
The diaphragm and intercostals for breathing
Isometric stretches are when your muscles are contracted and held that way. It is the opposite of dynamic stretching where your muscles are lengthening and contracting. An example of an isometric stretch is the plank; where you're resting on your forearms and your toes. Your abdominal muscles are being contracted but there is no lengthening and contracting movement. Dynamic stretching would be doing a pushup.