Herman Nation,
I have recently seen some discussions around IIFYM - If It Fits Your Macros. I wanted to give my perspective on this. Again, feel free to agree or disagree and no disrespect is intended for those who believe in or follow IIFYM.
The analogy I always use to explain this to people is gasoline and automobiles. All gasolines have an Octane rating (87,94, 91, etc). The higher the octane rating, the more powerful the explosion in your Internal Combustion Engine and the more efficient the fuel (less knocking and pinging in the engine from pre-mature fuel ignition). All cars built and sold in the U.S. must be able to use the minimum octane available here which is 87 regular. This drives the foreign car makers, especially the Germans, crazy because their countries don't use this type of low quality fuel. Why we have it is for another discussion. Anyways, cars' computer "brains" that control the air fuel mixture as well as minimize pre-mature fuel iginition because this is very stressful on an engine compensate for fuel quality.
The human body acts in a similar way. The "octane" is the quality of food you eat. The system "brain" is your metabolism and hormones. The "car" is your body. When you weight train, you put much higher stresses on your body than the average sedentry individual. To achieve an elite physique or have superior strength and stamina, you have to feed your body accordingly. An average Honda Accord or Ford Focus will run and perform fine all day running on 87 octane fuel. But these are average looking, non-performance, non awe-inspiring vehicles. A Ferrari or Lambo or any other exotic car is a different story. These are cars that draw stares and admiration and stir the soul with their performance. They can "run" on 87 octane but they will not run or perform as they were designed and eventually you will have some expensive repair bills to fix the engine from all the cheap gas. Fill it with 94 or 100 octane gas and watch what happens.......the "wow" factor.
The gyst of the analogy? If you want to have a physique above and beyond the average individual. If you want to look and feel at your best and have long term health and vitality, you need to eat good ALL the time. I think this whole IIFYM idea is the biggest scam in health and fitness - right up there with the statement "the check is in the mail." Younger individuals can get away with the occasional indulgence of 87 octane food. Older individuals can't (and I know this from first hand experience). But why tempt fate? Whether you are young or old you will always look and feel your best if you consistently eat good food. Garbage-in, garbage-out as they say. The other benefit as well is: If you learn good eating habits when you are young, they will be second nature when your older.
John