1-Facilitates breathing: A good posture naturally enables you to breathe properly. I started appreciating this after I started meditating regularly a few months back, coupled with a good posture. I found a really a huge difference in the amount of air I could inhale between sitting up straight and slouching. This is why yoga, Pilates and meditation exercises pay so much attention on getting your posture and sitting positions right.
2-Increases concentration and thinking ability: When you are breathing properly, you increase your thinking ability too. Our brain requires 20% of oxygen to do its job properly. More air, more oxygen. More oxygen, more brain food. More brain food leads to more thoughts and ideas.
3-Improve your image: People with good postures look smarter and more attractive. Have you ever seen someone with a bad posture and felt the person seemed unkempt, even though the person has not said or done anything yet? On the flip side, someone with a good posture naturally exudes an aura of assertiveness and appeal.
4-Feel even better about yourself: When you have a good posture, it helps to make you feel more self-confident, without even doing anything else different.
5-Avoid health complications: A bad posture results in several complications over time, such as increased risks of slipped disc, back aches, back pain, pressure inside your chest, poor blood circulation.