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Aim for at least 30 minutes of moderate-intensity exercise most days of the week

For the study that image is from, researchers gave mice the option of picking a vanilla or cinnamon-scented chamber (a door between the chambers was left open so they could pick the one they liked best)

Salter SJ, Cox MJ, Turek EM, Calus ST, Cookson WO, Moffatt MF, et al

Bernstein/Getty Images) (Getty Images)3 / 13Ben HoganBen Hogan smoking cigarette, Phoenix, Arizona, 1947 (Photo by Martha Holmes/The LIFE Picture Collection via Getty Images) (The LIFE Picture Collection via )4 / 13Jim LeylandDetroit Tigers manager Jim Leyland smokes in the dugout during a Grapefruit League baseball game against the Washington Nationals in Viera, Fla., Monday, March 24, 2008