Swing rhythm is a musical feel characterized by a relaxed, uneven division of beats, often found in jazz and swing music. In this rhythm, the first note of a pair is played longer, while the second note is shorter, creating a "long-short" pattern. This gives the music a bouncy, lively quality that encourages movement and dancing. The swing rhythm is commonly notated using triplets, where the first two notes are played as a triplet, and the last note is often omitted. This technique is essential in the styles of musicians like Duke Ellington and Count Basie, who helped popularize swing music in the early 20th century.