When choosing Pilates music, aim for 60-90 BPM for mat classes or 80-100 BPM...

https://wiki-cable.win/index.php/Best_Background_Music_for_Pilates_Instructors_Who_Cue_a_Lot

When choosing Pilates music, aim for 60-90 BPM for mat classes or 80-100 BPM for flow sessions to match the movement pace. Keep volume low enough so your voice and participants’ breath stay clear