Table 3.

Mean age and age range of heart rate response types

Heart Rate Response Type	Mean Age	Age Range
Type 1 (> 10% decrease)	44	21–69
Type 2 (-10%–20% change)	54	19–80
Type 3 (20–50% increase)	43	23–78
Type 4 (> 50% increase)	30	22–44