Which is true about target heart rate?
a. it varies by a person's body weight.
b. people in poor physical condition should exercise above their target heart rate until they are in better shape.
c. it is a percentage of your maximum heart rate.
d. it is a measure of the heart rate after 20 minutes of exercise.?

Lots of points if answered ! match the terms to their definition. 1. physical stress a term used to describe the workload placed on the body in general 2. plateau a principle that refers to the gradual increase in the amount of exercise sustained over a specified period of time 3. progression how quickly your heart rate returns to normal after an activity session 4. recovery heart rate a principle stating that the results you get will be directly related to the type of work you do and to specific muscles or body parts being worked 5. specificity states that the body adapts to increasing demand by developing the ability to handle those specific demands 6. stamina the ability to sustain a workload for an extended period of time 7. the overload principle an element of fitness that is characterized by a decrease in improvement or a leveling off of performance