Wendy plans to run her first 5k in two months and she needs to prepare. she has a busy schedule though and needs to select the best activity for her heart health, which activity should she pick

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.