PROSOURCEFIT ABDOMINAL MAT Instruction Manual & Exercise Manual page 6

1.
Lay on your stomach with the thinner end under your hips.
2.
Flex your feet so your toes are the only part of your foot touching the floor.
Place your hands behind your head.
3.
Engage your core and lift your torso off the ground.
4.
Lower torso back down.
5.
Repeat 5 times. Increase repetitions as you build strength.
ERECTOR CRUNCH