“…For example, some swimmers used their stroke tempo to obtain feedback about their performance; hence, they were fully aware of the time factor. A final plausible explanation is that performing synchronously with the music may enhance flow, particularly if the participants enjoyed the music (see Karageorghis & Terry, 1999a;Rhodes, David, and Combs, 1988). There is evidence to suggest that music improves the stylistic elements of movement (Chen, 1985;Spilthoorn, 1986), increases alpha brain wave activity (Burk, 1989;Wales, 1986) and enhances mood state Terry, 1997, 1999b) all of which are precursors of both flow and successful performance (Catley and Duda, 1997;Collins, Powell, and Davies, 1991;Jackson, 1992;Jackson, 1995).…”