Scientific 7 Minute Workout is the newest and most-advanced HICT (High-Intensity Circuit Training) app for Android! High-Intensity Circuit Training workouts are aimed at:

1) Burn the most fat in the least amount of time (it isn't called high-intensity for nothing)
2) Reducing the amount of time you workout to accommodate busy schedules
3) Uses bodyweight as resistance, meaning no equipment is required other than a chair

Scientific 7-minute Workout features the following:

✓ Voice commands, telling you when to break and when to start which exercise; useful for if you don't want to look at your phone/tablet while working out (New !)
✓ Set how long you want the breaks to be; with 5 second breaks at default, the overall exercise is exactly 6 mins 55 seconds (12 30-second exercises and 11 breaks), this can be increased or decreased
✓ Flat UI design, showing all completed exercises above the current exercise, and upcoming exercises directly below it
✓ Option to go back or skip forward to different exercises during the workout by scrolling up and down during the workout and tapping the exercise you want to go to
✓ 2 progress bars, one for the current 30-second exercise and one for the overall 6-minutes of working out (remember, what makes it a 7 minute workout is the breaks in between)
✓ Ability to pause during workout
✓ Complete Workout Log, showing you what days you have completed the workout and how many times
✓ Include videos guide you to practice in a lively and easy to understand!

Pro Features include:
✓ No ads make you lose interest when focused. You will find exciting than ever before !
✓ More features to get more health

Notice that if you read the science article, it recommends the workout to be completed 2-3 times. This means it is understandable to start out at doing the workout one time through, but eventually you want to move up to at least 2 times through to maximize the effectiveness of the workout.

Article that the workout is based on:
http://journals.lww.com/acsm-healthfitness/Fulltext/2013/05000/HIGH_INTENSITY_CIRCUIT_TRAINING_USING_BODY_WEIGHT_.5.aspx
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