Intensity Scales in Endurance Sports
Training intensity scales have a long history. In endurance sports, they have emerged from different sources, including scientific studies, technology developers, famous coaches, national sport governing bodies, etc. In this survey, we are attempting to gain insights into the broad array of intensity zone schemes that are used and how they are understood by coaches, athletes and scientists.
NB: The estimated completion time of this survey is 10 minutes. 

All responses are completely anonymous.
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1. What do you identify as? *
2. Do you identify as being functionally disabled or non-disabled? *
3. What is your age (years)?  *
4. What is your primary role/function? *
5. If you practice an endurance sport yourself or coach endurance athletes, at which level are you involved? Categories defined based on McKay et al. (2021): "Defining Training and Performance Caliber: A Participant Classification Framework". *
6. Which country do you currently work in or represent? *
7. Which endurance sport are you primarily involved with as scientist, coach, or athlete? (please base your remaining answers on this sport). *
8. How many intensity zones do you use in training prescription and intensity distribution quantification within the "aerobic range", up to 100% VO2 max? *
9. How many intensity zones do you use in training prescription and intensity distribution quantification within the "anaerobic range", above 100% of VO2max? *
10. Which choice below best describes how the intensity zones you use are determined? *
11. Coaches/practitioners and athletes, what was the source of the intensity scale/method you currently use to determine your training intensity zones? *
12. Which parameter(s) do you/your athletes use to control/quantify exercise intensity during training sessions? Check all that apply. *
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13. Which metric(s) is/are the intensity scale you use based on? Check more than one if you use multiple variables to guide you. *
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14. If you answered "Perceived Exertion; RPE" to question 13, what sensory information do you focus on IN TRAINING to determine your RPE?
15. If you answered "Perceived Exertion; RPE" to question 13, what sensory information do you rely on IN RACES to determine your RPE?
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16. If you answered %HRmax to Question 13, do you use any of the following models/methods to auto calculate your intensity zones? *
17. If you answered %LT HR to Question 13, do you use any of the following models/methods to auto calculate your intensity zones? *
18.  If you answered power (FTP) to Question 13, do you use any of the following models/methods to auto calculate your intensity zones? *
19. If you answered pace (threshold speed) to Question 13, do you use any of the following models/methods to auto calculate your intensity zones? *
20. If you answered pace (distance/time) to Question 13, do you use any of the following models/methods to auto calculate your intensity zones? *
21. If you answered blood lactate markers (LT1/LT2) to Question 13, do you use any of the following models/methods to auto-calculate your intensity zones? *
22. If you answered ventilation markers (VT1/VT2) to Question 13, do you use any of the following models/methods to auto-calculate your intensity zones? *
23. Please elaborate if you answered "other" to one or more of the 7 previous questions (16-22). (ideally write the name of the zones and corresponding percentages of the scale you use).
24. Look at the image below. In YOUR preferred intensity zone scheme, where does ZONE 1 / LIGHT GREEN (easy/"recovery") BEGIN (percentage of HRmax)?  *
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25. Continued:  In your preferred intensity zone scheme, where does ZONE 2 / DARK GREEN (easy/"steady") BEGIN (percentage of HRmax)?   Use the figure in Question 24 as reference. *
26. Continued:  In your preferred intensity zone scheme, where does ZONE 3 / YELLOW (moderate/"threshold") BEGIN (percentage of HRmax)?   Use the figure in Question 24 as reference.
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27. Continued:  In your preferred intensity zone scheme, where does ZONE 4 / ORANGE (hard/"severe") BEGIN (percentage of HRmax)?   Use the figure in Question 24 as reference.
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28. Continued:  In your preferred intensity zone scheme, where does ZONE 5 / RED (very hard/"extreme") BEGIN (percentage of HRmax)?   Use the figure in Question 24 as reference.
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29. If you use or are familiar with The Norwegian Olympic Federation's (Olympiatoppen) 5-zone model, which of the variables used in the scale do you "TRUST" MOST in daily training monitoring?  *
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