josie gibsons 30seconds slim

has anyone or is anyone doing josie 30second slim. i have been doing the level one three times a week now, the session only lasts for 20mins.
Is that enough for me to loss weight along with a low calorie diet.
my plan is too move upto the level 2 as i get stronger so i would be doing level 1 and 2 three times a week but i am just not sure if thats going to be enough for me to loss weight.

Can someone please expalin how much excercise you have to do a week to start to loss weight.

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