Good posture is an easy and very important way to maintain a healthy mind and body. When you practice correct posture, your body is in alignment with itself. This can alleviate common problems such as back or neck pain, headaches, and fatigue. Being in good general health and standing (or sitting) tall will also boost your bearing and self confidence.
1. Identify good posture. Good posture is nothing more than keeping your body in alignment. Good posture while standing is a straight back, squared shoulders, chin up, chest out, stomach in, feet forward, your hips and knees in a neutral position. If you can draw a straight line from your earlobe through your shoulder, hip, knee, to the middle of your ankle—–you've got it.
2.Train your muscles to do the work. Exercises that strengthen the muscles across your upper back and shoulders will help you to maintain good posture. You don't need to develop a body builder physique—–it's more important to build "muscle memory" so that you unconsciously and naturally maintain correct posture without fatigue. When you lift weights, you should exercise the agonist and antagonist muscles evenly. This means that you should exercise your hamstrings as much as your quadriceps, chest as much as your back, and so on. This will help with correct posture.
3.Do stretches. This can greatly help if you find that you have a sore back or neck. It's also good to do during the day, if your job requires you to sit for long periods.