RFLB works based on an extended duration of fasting followed by either resistance or cardiovascular training. Your body has no idea what time it is, therefore this period can take place at any literal time of the day or night you desire.
For example, if you can only workout early in the morning, adjust your feeding schedule to allow for a longer fast the night before. Eat your last whole meal about 5 hours prior to bed. 3 hours later, begin the MORNING routine of supplements (minus the coffee and cardio, unless you have the energy for a long walk.) Wake up and train, then begin your feedings where RFLB suggests post-workout.
If you can only workout at night, you can do one of two things. First, you can use the same schedule as found in RFLB but wait 2.5 hours after any meal to workout. This is less productive for fat loss, but still efficient. This way you are still training on a fasting state, even though the fasting is only 2.5 hours long. A better approach is to begin your fasting mid-afternoon (again, you just adjust the feedings to the time of day by using your workout as the focal point), fast 5 hours, then workout. Your mid-afternoon schedule would therefore become RFLB's morning schedule.
You can get clever and adopt the principles to any schedule you prefer, although the one found in RFLB is the easiest for most people.
Just remember the goal: To fast 12 hours or so before working out and consuming your first whole meal of the day. During fasting (except for sleep) consume the amino acids and other supplements as directed.
