Another name for false productivity is a. making poor decisions. b. driving toward success. c. filling your mind with negative self-talk. d. spinning your wheels.

A name for false productivity would be D - spinning your wheels.

Spinning your wheels is a phrase that can be used for false productivity because the wheels are spinning but they aren't spinning anywhere as you're spinning your own wheels. This can be a difficult phrase to grasph your head around but is very useful once you know it. 

It hurts for them at first then they get used to it

Target heart rate is the answer