Ballet-teaching and aerobics doesn’t seem to be a pure pairing, but this high-Power video proves it’s achievable, and The end result is really a stable exercise. Kym Perfetto When her Instagram feed is stuffed with badass biking shots, biking is only some of NASM-Accredited coach Kym Perfetto's YouTube content. (Despite https://www.youtube.com/watch?v=DIsm7e-x5gw