Most people can’t follow directions. I hate to say that, but it’s true. And I fall into the “most” group, so I can point the finger. They either don’t read the whole service or they start fooling with the course. Then when the program doesn’t work, it’s the program’s defect, not the person’s. https://bit.ly/3i6LJ0n
The reality is the body changes from overload. Any good course will have a particular method or methods of overload in it. Bad applications do not. (You can identify these because they look randomized.)
So this year, save yourself time and energy — don’t try to change any plans unless you are a knowledgeable (and then it’s probably even more harmful) and just stick to the service as discussed.