Choosing Pilates class music is about matching the tempo to your workout: 60-90...

https://meditationmusiclibrary.com/blogs/wednesday-wisdom-blog/what-music-works-best-in-a-pilates-studio

Choosing Pilates class music is about matching the tempo to your workout: 60-90 BPM for mat work or 80-100 BPM for flow classes. Keep the volume low so your voice and breath cues come through clearly