Final answer:
Having good posture and avoiding lifting heavy objects with your back will keep your spine straight and help prevent back strain and damage.
Step-by-step explanation:
Having good posture is important for keeping your spine straight. When you stand or sit with good posture, your center of gravity is directly above the pivot point in your hips, which helps to avoid back strain and damage to disks.
Poor posture, such as slouching or hunching over, can put extra stress on your spine and lead to back pain and problems. It's important to be mindful of your posture and make an effort to sit and stand straight.
In addition to maintaining good posture, it's also important to avoid lifting heavy objects with your back. Lifting with your back instead of your legs can cause muscle strain and damage to your spine.