Having a strong core helps you to maintain a healthy spine because it helps to improve your posture which reduces back pain. Here are some things you can do to strengthen your spine:

• Workout consistently: Consistently working out your core will help to build muscle and strengthen it over time. 
• Do walk-and-carry exercises: Walk-and-carry exercises involve you carrying a weight while walking. They’re a great exercise for strengthening your core.
• Do crunches: Crunches help to work your abdominal muscles and helps to improve your overall core strength.