Step 1. Make a long, curved line with your pencil. This shows the bottom of the pectoralis major, also known as the "pecs," which is a chest muscle.

Step 2: Draw your abs.

Step 3.Draw a long curved line from one of the pecs to the other. The side of the torso, or stomach, is defined by this.

Step 4. Complete the line.

Step 5. Draw two zig-zag lines. This is a common misunderstanding.

Step 6. Draw three circles in the centre.

Final Step :  Sketch the upper body.