By Gay Gasper, it’s four easy-to-follow workouts — each one focused on a specific muscle group: your thighs, arms, buns or abs. Complete with a beginning warm-up and ending stretch, these compact programs fit anyone’s busy schedule. Gay’s 21 years of teaching experience really show in her straight-forward cuing, emphasis on control and careful selection of exercises (they’re all her favorites — the most effective routines she’s ever found to reshape each body part). Like all the “Dummies” videos, you get on-screen modifications, terminology tips and safety suggestions (and this program also includes a countdown timeclock to motivate you through the entire 15-minute workout). One-on-one teaching. Requires 2 to 10 lb. dumbbells.