i play the keyboard standing up and it can sometimes hurt my neck, shoulders and upper-back from slouching, but when i sit down it does not to my beleif affect, in an un-natural way, any part of my body.
A straight posture is important when cooking. A hunched back is unhealthy and can slowly damage your spine. Even while sitting, a straight posture is essential.
Body posture refers to the position and alignment of the body in relation to its surroundings. It encompasses the way we hold ourselves and distribute weight while sitting, standing, or moving. Good body posture is essential for maintaining musculoskeletal health and preventing injuries.
These tendons affect the human upright posture by supporting the abdominal muscular wall. The viscera are then not allowed to become pendulous while the human is in an upright posture.
Poor posture can decrease the lung capacity. While standing up straight, good posture allows the lungs to expand over a greater area, meaning the lung capacity has increased. Slouching, or doing things that are in bad posture reduces the area your lungs can expand into. This decreases the amount of air you breath in with every breath. Consequently you will have to take more breaths with bad posture to equal the amount of air intake with proper posture (though there would not be a large difference).
Balance
yes
It's a common posture exercise.
Maintaining good posture when sitting or standing helps to prevent back and neck pain, reduces the risk of developing musculoskeletal issues, and improves breathing and circulation. Good posture also projects confidence and professionalism in social and work settings.
Because you don't want to injure yourself.
your feet should be flat on the ground to create good posture
Both A & B
Posture while eating would not make someone fat. It depends more on what you are eating.