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Table 2 Summary performance improvement index changes

From: A Pragmatic Approach to Resolving Technological Unfairness: the Case of Nike’s Vaporfly and Alphafly Running Footwear

  PII positive change range PII largest change since 2016 World record PII change ranking
Marathon: men’s 0–7.2 2.1 14th/38
Half marathon: men’s 0–7.5 0.98 11th/32
Marathon: women’s 0.1–9.2 2.0 21st/30
Half marathon: women’s 0–6.2 0.7 15th/27