Weak core muscles make one more susceptible to poor posture, back pain and injuries during activity. For this reason, it is important to have strong core muscles. Simple exercises performed three to four times a week can be done to strengthen your core.
1)Position yourself on all fours, with your hands and legs supporting you on the floor.
2)Slowly extend your left leg straight behind you.
3)Make sure that your back remains straight and parallel to the floor.
4)Hold this position for 5 to 10 seconds.
5)Repeat using the opposite leg.