Which of the following technologies would be the most useful to you for monitoring heart rate? foot pod stopwatch gps app on your phone pedometer

How can a person  best  reduce the risk of injuries on the road?  

As you sit in the library with your friend studying for your weekly quiz on the integumentary system, you come upon an article about the hazards of prolonged exposure to the sun's rays. your curious nature leads you to research the subject further. you're fascinated to learn that minimal exposure to the sun allows you skin to manufacture vitamin d, which is important to maintain homeostasis. you also read that although sunscreen can protect you from the ultraviolet (uv) rays of the sun, some medications can actually increase a person's sensitivity to the sunlight.

Wich technque is not recommended for use as a supporting detail