Lose 7 Lbs. in 7 Days

I want to know how know how you should do it and how may seconds you should do it everyday to lose weight in a week.Please give me good information.Thank you very much !!!
?Keelah?

You won’t lose weight in a week. The plank is just used as a form of resistance training. To lose weight you need to do some form of cardio.

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