Shane's target heart rate zone is 130-168, during a race, he checks his wrist monitor which indicates that his heart rate is currently 142 which of the following will him get the most productive workout, based on the information he has gathered?
a)take a water break and reduce his heart rate
b)decrease to a jog and then run again
c)keep running at the same speed and intensity
d)walk one minute, then begging running at the current peace