In one of the first legal applications I've seen of the concepts about music's relationship to tempo discussed in this book, South Korea has banned tempos higher than 120 bpm in gyms to prevent the spread of Coronavirus: No Gangnam Style: South Korea Covid rules enforce slower music in gyms, https://www.theguardian.com/world/2021/jul/12/no-gangnam-style-south-korea-covid-rules-enforce-slower-music-gyms.