The heart rate of children may change within 24 hours a day. Generally speaking, exhaling is faster, inhaling is slower, lying is slower than sitting, exercising is faster, emotional crying is faster than calm and quiet, and the more careful you are, the faster you jump. Under normal circumstances, the average number of newborns is 120 ~ 140/min, 1 year 120/min, 3-year-old10/min and 5-year-old/kloc-0.