Lie on your back on desk or mat with hips and knees bent to ninety ranges with feet flat on ground and place arms at sides with palm- facing down.
Draw in abdominal muscles and maintain the same throughout the duration of exercising.
Slowly lift your butt off the table/mat by the use of your glutes and hamstrings till your torso is in line with thighs.
Preserve for 3-5 seconds and perform for 10-20 times.