Jessica Smith, fitness expert and the creator of the Walking for Weight Loss, Wellness and Energy DVD, has created a 30-minute workout (no gym membership required) exclusively for iVillage that can be done indoors -- all you have to do is simply walk in place.
Start with the warm up then move to each interval with two minutes of brisk walking. To boost your intensity and work more muscles, add in arm movements throughout your workout. Aim to do this workout five days per week for the best results. Start by walking on Monday, Wednesday and Friday for your first week; add in Saturday during weeks 2 and 3; and then add in a fifth day.
Check out the entire workout here: Jessica Smith Indoor Walking Workout 
What do you think about it?