Lucille has been told she needs to improve her heart health, and she is ready to get started . there are many activities she is considering for her new routine , but she knows she must first calculate her target heart rate zone. when is the best time for her to begin gathering data do do this calculation?

The correct answer for the given situation above would be option A. The best time for her to begin gathering data in order to calculate her target heart rate zone would be, when she is resting. You need to do this for several days in a row for a consistent reading and is usually done before getting out of bed in the morning. 

This needs more info