Explain the association between dislocated joints and torn ligaments. Identify situations that may require professional health services.

If it's a smaller child or infant, place one on the middle of the chest and on the child's back. (if it is a bigger child with enough room for two, place one on the upper right/your left of the chest, and one on the lower left/your right) the pads should never touch each other. 

What subject do you need with?

Target heart rate is the answer