HR (bpm) means by condition
  Breathing Scene 1: 72.61
  Spring Scene: 72.33
  Summer Scene: 72.50
  Autumn Scene: 72.89
  Breathing Scene 2: 73.78

RR (ms) means by condition
  Breathing Scene 1: 843.33
  Spring Scene: 860.78
  Summer Scene: 862.00
  Autumn Scene: 850.44
  Breathing Scene 2: 839.94

RMSSD (ms) means by condition
  Breathing Scene 1: 52.70
  Spring Scene: 56.95
  Summer Scene: 41.15
  Autumn Scene: 41.89
  Breathing Scene 2: 42.59