How does So You Think You Can Dance Canada judge and dancer extraordinare Tré Armstrong keep such a lean, fit figure and the ability to jump so high? Dance, of course—which she does for three hours per week, on average. (It’s great for toning and cardio.) Plus, there’s her weekly co-ed basketball game, which helps with the leaps. Her best workout advice: “Just keep moving.” So crank up your liveliest mix of tunes, warm up with three or four minutes of your coolest dance steps and then try these four workout moves.