1000 km was incorrectly written as “100 km”.
A correction has been made to the section 2 Materials and methods, 2.1 Study design and recruitment, Paragraph Number 2:
“A total of 249 participants completed the questionnaire. We categorised participants as experts (n = 20, 8%) if they met the following criteria:
• Over 500 ski preparations per year.
• Over 1,000 km of skiing per year.
• Reported a role as waxer.
The remaining participants were classified as non-experts (n = 229, 92%). This classification was established post-hoc in consultation with national team ski technicians from XC skiing and biathlon to ensure a sufficiently high threshold was established to be considered an expert.”
The original version of this article has been updated.
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