I was traveling in Egypt 2 yrs ago during Ramadan, and out of respect followed the rules. I was on p3 and did fine. I was worried, and as an american knew I wasn't obligated to follow the traditions....but as a visitor I wanted to respect their beliefs. I'd say don't worry about the 3 hr rule....you will have lots of activity and exercise in those hrs before bed time, from what I experienced,...so embrace the tradition, and it will work for you. . Hope this helps.