Our backs suffer a lot—just ask those who spend hours in front of the PC without any physical exercises! Sedentary lifestyle, bad posture, injuries—all lead to the debilitating backache. To prevent this problem, you need to strengthen your back. But, how do you strengthen your back? If that is what you are worried about, you need to try back extension exercises. Strengthening your back, these exercises will keep aches and pains far away.