The standing posture
When standing still, look straight ahead with your feet 10cm apart. Stand as tall and relaxed as possible. Since the advent of smart phones, the standing posture for many has really gone downhill as people are now looking down constantly at their phones. This pulls the neck forward, resulting in a hunchback. Always look ahead if you can.
You will instantly look and feel slimmer as your lower and upper back will lift and your shoulders will relax. This will reduce strain throughout your spine, especially your upper
torso and neck.