Devon's target heart rate zone is 140bpm—177bpm. Julian's target heart rate zone is 148bpm—181bpm. They stop running and take their pulse, and both count the heart rate at 173bpm. If they decrease their heart rates by 20bpm, who will be in his THR zone?

Both Devon and Julian

Neither Devon nor Julian

Devon only

Julian only

neither

it's EITHER.

both devon and julian

To determine who will be in their target heart rate (THR) zone after decreasing their heart rates by 20bpm, we need to compare their new heart rates with their respective THR zones.

Let's start with Devon's THR zone, which is 140bpm—177bpm. If Devon's original heart rate is 173bpm and he decreases it by 20bpm, his new heart rate will be 153bpm.

153bpm is still within Devon's THR zone (140bpm—177bpm), so Devon will still be in his THR zone after decreasing his heart rate.

Now let's move on to Julian's THR zone, which is 148bpm—181bpm. If Julian's original heart rate is also 173bpm and he decreases it by 20bpm, his new heart rate will be 153bpm as well.

153bpm is also within Julian's THR zone (148bpm—181bpm), so Julian will also be in his THR zone after decreasing his heart rate.

Therefore, the correct answer is: Both Devon and Julian will be in their THR zone after decreasing their heart rates by 20bpm.