that in the first week. you might only do 2 hours, but 2 hours is better than nothing. then try to beat that next week. and the following week. keep up this trend of beating your own score until you are exercising 14 hours per week out of habit.
if you are in urgent need to lose weight, that is the time to start exercising for 2 hours every day for a week. even if the exercise you are doing is just going for a long walk, at least you are doing something instead of nothing - and having an urgent reason to go for long walks, jogs, exercising outdoors will 