Simple there are a few ways. Combine them.
Stand with your hands on the lower part of the back and waste, like grandma used to do. And lean back slightly, while stretching the lower back. Do a few times.
Then stand legs wide apart and bent. Have your hands resting on your knees. It will look as if you are trying to poke your butt outward. And you are because you are arching your lower back inadvertantly. Doing it properly will feel good on the lower back. Do as long as comfortable.
Wear good supportive shoes and do not sit too much. When you do, try to keep your legs raised.
the muscle spindle detects excessive stretch within the muscle , it response and makes the muscle contract
Stretch marks are usually the result of the tissue under the body grows faster than the skin can expand, causing it to stretch. So you might have gained some weight in your bum at a fast rate creating stretch marks.
Quadrilateral
The biggest muscle in your body is Gluteus Maximus, so no your "bum is not the biggest"
your bum
buttocks
Your groin is being stretched.
The cell is long because the , muscle needs to stretch and contract when you use that muscle. Therefore it needs to be long in order to stretch.
If you think about your mind as if it were a muscle, you can figure this out. If you stretch a muscle, it gets stronger. If you stretch your mind, you think of new things and your mind gets smarter.
No
yes skeletal muscle stretch by means of contraction.
True.