Originally a Spanish dance in 3/4 time, it was changed in Cuba initially into 2/4 time then eventually into 4/4.
It is now present as a very slow type of Rumba rhythm. The music is frequently arranged with Spanish vocals and a subtle percussion effect, usually implemented with Conga or Bongos.
The Bolero is characterized by long sweeping side steps and use of rise and fall to create a softness which makes this dance unique among the rhythm dances. The expanding and contracting dance position makes a very dramatic and romantic statement.