How “much” is “too much” and how “hard” is “too hard”? Unfortunately for our internal experience, exercise doesn’t come in denominations of much and hard. What might be considered a difficult session for a couch potato is a breeze for an elite commando, and what might be a “light” training day for said commando might be hell itself for an average recreational athlete.
It’s all extremely subjective. How, then, do you train yourself to understand your limits and capacities? You do this by journaling your training and by applying your tools. I have a very intuitive training program at FC (can be applied to any physical training) gives you the ability to differentiate form, exertion and discomfort subjectively, and you can then use this as a determinant factor in progressive resistance. By learning to quantify the subjective, you give yourself an immediate sense of where you stand, and you create a very accurate gauge of your progress.
In order to make this tool work for you, you must first learn how to use it. That takes a bit of diligence in the beginning. By journaling your training and by rating these three variables, you will come to a better understanding of your body and you will calibrate your instrument. The skill of rating your performance becomes more finely honed with each use, until eventually you barely have to think about it. But you will have to think about it in the beginning.