Which of the Following Would Be the BEST Representation of a Target

Multiple Choice

Which of the following would be the BEST representation of a target heart rate for a 20 year old woman? Use the Karvonen formula and assume an exercise intensity of 70% and a resting heart rate of 80.

A) (220 - 20) x 70%
B) [208 - (.7 x 20) ] x 70%
C) [[208 - (.7 x 20) ] - 80] x 70%. Then add 80 back to the total.
D) [[208 - (.7 x 20) ] - 20] x 70%. Then add 20 back to the total.