“…However, in line with other researchers, we concur that it is more ''reasonable to recommend giving up smoking and promoting physical activity at the population level'' (Senti et al, 2001, p. 390) in order to reduce overall harm. Although evidence is inconsistent, becoming more physically active may serve as a ''gatekeeping'' function, increasing the likelihood of subsequent smoking cessation attempts (Bock, Marcus, Rossi, & Redding, 1998;Boudreaux, Francis, Carmack Taylor, Scarinci, & Brantley, 2003;Doherty, Steptoe, Rink, Kendrick, & Hilton, 1998;Emmons, Marcus, Linnan, Rossi, & Abrams, 1994;King et al, 1996;Nguyet, Beland, & Otis, 1998). As with harm reduction strategies in general (Fiore et al, 2000), further research is undoubtedly required to prove such a proposition and to ensure that increases in physical activity do not reduce the perceived need to quit smoking.…”