Essentially a summary of the information
The target heart rate zone is 60-80%
That can be taken many different ways maybe: they push themselves to hard and don’t know when to take a break or they cant settle down, sleep or, don’t know when to stop.
It will be Josh who gets his target THR. His range is within 135 bpm—175 bpm while the actual heart rate was 165 bpm, deducting it with 20 bpm results to 145 bpm - falling to the 135 bpm—175 bpm THR range. Although doing the same method as Josh's results to 165 bpm for Dominique, it doesn't fall to his 150 bpm—183 bpm THR range.