From bending and picking up to stretching out to get something from height, Strong back is necessary that gives us support to in our daily routine to do these tasks. You won’t get a strong lower back from birth even HULK didn’t had it also LOL. You have to do some bending and stretching exercise to make your lower back muscles strong.
Just follow this exercise video, it will take only few minutes daily and the outcome will be a healthy life with strong back. Not a bad deal, must give it a try.