A team in Japan tried different methods with more than 20 infants and tracked their heart rates to see how quickly they calmed down. They say the method that works best takes about 10 minutes, and only has two steps to remember:
Step One: Carry them around for five minutes. It'll start to slow their heart rate within 30 seconds. And it calms them down even better than rocking them does.
Step Two: Sit down and hold them for another five to eight minutes. Be patient, or they might wake up. Waiting at least five minutes gives you the best chance of them staying asleep when you lay them back down.
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