Try doing some simple exercises while you wait for the oven timer, stir pasta sauce, or between chopping vegetables. Lorenz suggests this barre-inspired move to strengthen your lower body:
Stand with your hands on the edge of the countertop and your elbows bent at a 90-degree angle. Place your heels together and turn your toes outward so your feet form a narrow V.
Rise up on the tips of your toes (or the balls of your feet), squeeze your glutes, and bend your knees slightly, while keeping your heels, hips, and shoulders in line.
Pulse for 30 reps, move your hips and up and down one inch for 30 reps, and press your heels together for 30 reps.