Bibliography (8):

1. The stress of chess players as a model to study the effects of psychological stimuli on physiological responses: an example of substrate oxidation and heart rate variability in man

2. Contactless Real-Time Heart Rate Predicts the Performance of Elite Athletes: Evidence From Tokyo 2020 Olympic Archery Competition

3. Indoor Air Quality and Strategic Decision Making

4. Cognitive Performance and Mood During Respirator Wear and Exercise

5. Wikipedia Bibliography:

   1. https://en.wikipedia.org/wiki/Psychophysiology

      https://en.wikipedia.org/wiki/Psychophysiology

   2. Heart rate variability

   3. https://en.wikipedia.org/wiki/Heart_rate

      https://en.wikipedia.org/wiki/Heart_rate

   4. Statistical-significance