Ab Crunch Machine
Weight machines are ideal to isolate and build specific upper and lower body muscles.
Different weight machines can be used on different muscles and have visual guides.
For an Ab Crunch you sit down and crunch forward against a weighted pad to work your stomach muscles.
Adjust seat to proper distance and lower harness over your shoulders.
Select a light weight to begin with - one you feel you could press ten times without stopping.
Grab handles on sides of harness push forward with your chest.
The slowly let the machine come back to its resting place.
Do this 10 times for a complete set. For the future add a set and weight.