Only takes 4 minutes, but its the longest 4 mins of my life: Burns as many calories as a 40-60 minutes run. Makes your body adapt and improve very quickly. Increases metabolism for up to the next 36 hrs. Takes only FOUR minutes, Developed by a Japanese Scientist. NO EXCUSES.
Jillian Michaels: 6 Week Six-Pack Workout- Level 1 is a high intensity fat-blasting abdominal workout that employs a sure-fire combination of core-focused cardio circuits and ab-toning exercises that target multiple muscle groups simultaneously to boost the metabolism, slim the waistline, and chisel rock-hard abs.
Drop a Jean Size Workout. "I did this workout 3 days a week last year and not only did I drop a jean size, but I kept it off. I highly recommend this workout and just about any workout that comes from Fitness Magazine. Their workouts are reliable and will give you results."
Muffin Topless Workout: 50 jumping jacks 5 burpees 30 seconds of mountain climbers 5 jump squats 30 seconds of jump rope 10 push ups 30 second break Repeat this 3-5 times (adjust according to fitness level.. you may need to do less or you may be able to do more
Another pinner said: This website is AMAZING. It is my workout bible, and best of all, its completely FREE. Tons of workout vids and plenty more to stave off ruts. Most of the routines are between 12-20 mins long and that's all you need.