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.
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.
the muscle spindle detects excessive stretch within the muscle , it response and makes the muscle contract
The biggest muscle in your body is Gluteus Maximus, so no your "bum is not the biggest"
Quadrilateral
your bum
Your groin is being stretched.
buttocks
The receptor for the stretch reflex is called the muscle spindle. Muscle spindles are sensory receptors located within the belly of muscles, and they detect changes in muscle length and the rate of that change. When a muscle is stretched, the muscle spindle initiates the stretch reflex, leading to a contraction of the muscle to resist the stretch. This reflex helps maintain posture and balance.
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.
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.
No
yes skeletal muscle stretch by means of contraction.