I'm not sure where you got your information on Islam from, but I'm not aware of any Muslim being forced to observe the holy month of Ramadan. Secondly, I would not use Ramadan for cutting on body fat percentages because in Ramadan, your metabolism would actually slow down a notch due to both food and water restrictions. I'm sure there are Muslin scholars who would not even allow for competitive bodybuilding, just as they would not allow for boxing etc... but that's an altogether different subject which is not for this forum.
Fadi.