While everybody is different and can respond to fasting differently, OMAD can work without exercise. However, it’s worth keeping in mind that “working” can mean a lot of different things—not everyone adopts a fasting-based food routine with the same end goal in mind, so how you structure your plan should first and foremost be about your needs. For example, if your goal is to build muscle strength and mass, OMAD alone may not be effective. Likewise, some people may find physical activity difficult to safely manage when following this plan.