I agree with Iris! Listen to your body! If you're becoming exhausted, take a day or two or even a full rest week, then pick up where you left off! The 6 1/2 month rotation is brutal! Luckily, I've made it okay without that type of exhaustion, but when my rest week gets here, boy, am I ready for it! I have one next week! So looking forward to relaxing with some walks and runs and no weights! Don't get me wrong, I'm loving the results I'm seeing!
Next time through will be my second rotation and it will be the 3 1/2 month one!