What it is: A variety of workouts you can download to turn your MP3 player or iPod into a mini gym.
What we like: Wide variety of routines and fitness levels, including programs for calisthenics and use with exercise equipment.
What we wish were different: Some instructions are confusing. Yoga and Pilates are better learned in person.
What it costs: $2 to $17 per workout; weekly, monthly or yearly subscriptions from $10 up. Visit www.itrain.com, www.cardiocoach.com, www.gymp3.com, www.helmesinnovations.com (iPod only).
What it is: Interactive individualized fitness programs for PlayStation 2, Xbox or computer.
What we like: Customized workouts and a meal planner based on your profile. Includes a tutorial to help with confusing exercises.
What we wish were different: After 16 sessions, exercises start repeating.
What it costs: $34.99 and up. Visit www.yourselffitness.com.
What it is: 24/7 exercise TV on demand. Founded by Jake Steinfeld of Body by Jake, it offers varied programs, including exercise for kids, prenatal fitness and Pilates en Español.
What we like: 90 workout options!
What we wish were different: Requires digital cable from Comcast or Time Warner.
What it costs: Varies (up to $15). Visit www.exercisetv.com.
What it is: This “virtual fitness center” tracks your movements with a camera, then shows how each workout compares to previous sessions. Choose from options including Cardio Zone, Combat, Mind/Body or Toning—and watch yourself work out as a virtual personal trainer guides you.
What we like: You can react to obstacles by punching, kicking, ducking and weaving.
What we wish were different: Requires a lot of space. In low light, the camera fails to register some movements.
What it costs: $49.99 (includes camera). Available wherever PlayStation games are sold.
Turn On, Tune In and Tone Up
Did you know that your iPod, PC or TV can now make you buff? Alicia Villarosa checks out the latest fitness tools.