* This workout requires the user to wear the telemetry chest strap.
** Target Heart Rate (THR) is a percentage of the theoretical maximum. For example, a 40-year-old user's THR for the
HEART RATE HILL workout is 144. This workout targets 80 percent of the maximum, so the equation would be
(220-40)*.80=144. A 20-year-old users THR is 160, so the equation would be (220-20)*.80=160. A 20-year-old users
THR is 160, so the equation would be (220-20)*.80=160.