What is chest fly (lying down)?

Chest fly (lying down)

1. Lie on a bench or exercise ball, and hold light weights straight up over your chest. You can also use soup cans or filled water bottles for weights. Do not lock your elbows. You can keep them slightly bent if that is more comfortable.
2. Slowly lower your arms, keeping them extended, until the weights are level with your chest or slightly lower.
3. Slowly raise your arms until you are in the starting position.
4. Repeat 8 to 12 times.